diff --git a/lua/Trans/conf.lua b/lua/Trans/conf.lua
deleted file mode 100644
index fc61d66..0000000
--- a/lua/Trans/conf.lua
+++ /dev/null
@@ -1,84 +0,0 @@
-return {
-    view = {
-        cursor = {
-            -- NOTE ：
-            -- 可选的风格：['fixed', 'relative', .. ]
-            style = 'fixed',
-            border = 'rounded',
-            -- NOTE :
-            -- 如果style设置为'relative'
-            -- 则其值代表最大限制, 设置为负数则无限制
-            width = 30,
-            height = 30,
-        },
-        float = {
-            top_offset = 1,
-            relative_width = 0.8,
-            border = 'rounded',
-        },
-    },
-    display = {
-        phnoetic = true,
-        collins_star = true,
-        oxford = true,
-        -- TODO
-        -- history = false,
-    },
-    order = {
-        'title',
-        'tag',
-        'pos',
-        'exchange',
-        'zh',
-        'en',
-    },
-
-    highligh = {
-        TransWord = {
-            fg = '#7ee787',
-            bold = true,
-        },
-        TransPhonetic = {
-            fg = '#8b949e',
-        },
-        TransRef = {
-            fg = '#75beff',
-            bold = true,
-        },
-        TransTag = {
-            fg = '#e5c07b',
-        },
-        TransExchange = {
-            link = 'TransTag',
-        },
-        TransPos = {
-            link = 'TransTag',
-        },
-        TransZh = {
-            link = 'TransWord',
-        },
-        TransEn = {
-            fg = '#bc8cff',
-        },
-    },
-    db_path = '$HOME/.vim/dict/ultimate.db',
-
-    icon = {
-        star = '⭐',
-        isOxford = '✔',
-        notOxford = ''
-    },
-    auto_close = true,
-    style = {
-        input = 'float',
-        cursor = 'cursor',
-        select = 'cursor'
-    }
-    -- TODO  add online translate engine
-    -- online_search = {
-    --     enable = false,
-    --     engine = {},
-    -- }
-
-    -- TODO register word
-}
diff --git a/lua/Trans/conf/base.lua b/lua/Trans/conf/base.lua
new file mode 100644
index 0000000..0a7f899
--- /dev/null
+++ b/lua/Trans/conf/base.lua
@@ -0,0 +1,17 @@
+local M = {}
+
+local buf_opts = {
+    filetype = 'Trans'
+}
+
+local buf = vim.api.nvim_create_buf(false, true)
+for k, v in pairs(buf_opts) do
+    vim.api.nvim_buf_set_options(buf, k, v)
+end
+
+M.buf = buf
+
+M.group = vim.api.nvim_create_augroup('Trans', { clear = true })
+
+
+return M
diff --git a/lua/Trans/conf/default.lua b/lua/Trans/conf/default.lua
new file mode 100644
index 0000000..667274f
--- /dev/null
+++ b/lua/Trans/conf/default.lua
@@ -0,0 +1,110 @@
+local M = {}
+
+-- INFO :加载的规则 [LuaRule]
+M.replace_rules = {
+    'order',
+    'Trans.+',
+}
+
+M.conf = {
+    style = {
+        window = {
+            input = 'float',
+            cursor = 'cursor',
+            select = 'cursor'
+        },
+        order = {
+            'title',
+            'tag',
+            'pos',
+            'exchange',
+            'zh',
+            'en',
+        },
+        conf = {
+            -- NOTE :可选的风格：['fixed', 'relative', .. TODO]
+            -- width 和 height说明：
+            -- 大于1：
+                -- 如果style为fixed ,    则为固定的长宽
+                -- 如果style为relative , 则为最大长宽
+            -- 小于1:
+                -- 如果style为fixed ,    则为默认
+                -- 如果style为relative , 则为无限制
+            -- 0 ~ 1:
+                -- 相对长宽
+            cursor = {
+                style = 'fixed',
+                border = 'rounded',
+                width = 30,
+                height = 30,
+            },
+            float = {
+                style = 'fixed',
+                border = 'rounded',
+                width = 0.8,
+                height = 0.9,
+            },
+        },
+    },
+    ui = {
+        highligh = {
+            TransWord = {
+                fg = '#7ee787',
+                bold = true,
+            },
+            TransPhonetic = {
+                fg = '#8b949e',
+            },
+            TransRef = {
+                fg = '#75beff',
+                bold = true,
+            },
+            TransTag = {
+                fg = '#e5c07b',
+            },
+            TransExchange = {
+                link = 'TransTag',
+            },
+            TransPos = {
+                link = 'TransTag',
+            },
+            TransZh = {
+                link = 'TransWord',
+            },
+            TransEn = {
+                fg = '#bc8cff',
+            },
+        },
+        icon = {
+            star = '⭐',
+            isOxford = '✔',
+            notOxford = ''
+        },
+        display = {
+            phnoetic = true,
+            collins_star = true,
+            oxford = true,
+            -- TODO
+            -- history = false,
+        },
+    },
+    base = {
+        db_path = '$HOME/.vim/dict/ultimate.db',
+        auto_close = true,
+        lazy_load = false,
+        debug = {
+            enable = true,
+            type_check = true,
+            unknown_conf = true,
+        },
+    },
+    -- TODO  add online translate engine
+    -- online_search = {
+    --     enable = false,
+    --     engine = {},
+    -- }
+
+    -- TODO register word
+}
+
+return M
diff --git a/lua/Trans/conf/init.lua b/lua/Trans/conf/init.lua
new file mode 100644
index 0000000..01baf8e
--- /dev/null
+++ b/lua/Trans/conf/init.lua
@@ -0,0 +1 @@
+return require("Trans.conf.loader").get_conf()
diff --git a/lua/Trans/conf/loader.lua b/lua/Trans/conf/loader.lua
new file mode 100644
index 0000000..7ccad44
--- /dev/null
+++ b/lua/Trans/conf/loader.lua
@@ -0,0 +1,52 @@
+---@diagnostic disable: unused-local, unused-function
+local M = {}
+
+local replace_rules = require("Trans.conf.default").replace_rules
+local conf          = require("Trans.conf.default").conf
+local user_conf     = require("Trans").conf
+local type_check    = require("Trans.util.debug").type_check
+local is_loaded = false
+
+local function need_extend(name)
+    type_check {
+        name = { name, 'string' }
+    }
+    for _, rule in ipairs(replace_rules) do
+        if name:match(rule) then
+            return false
+        end
+    end
+    return true
+end
+
+-- 加载用户自定义的配置
+---@param t1 table
+---@param t2 table
+local function extend(t1, t2)
+    type_check {
+        t1 = { t1, 'table' },
+        t2 = { t2, 'table' },
+    }
+    for k, v in pairs(t2) do
+        if type(v) == 'table' and need_extend(k) then
+            extend(t1[k], v)
+        else
+            t1[k] = v
+        end
+    end
+end
+
+M.get_conf = function()
+    if not is_loaded then
+        M.load_conf()
+    end
+    return conf
+end
+
+M.load_conf = function()
+    -- loaded_conf = default_conf:extend(user_conf)
+    extend(conf, user_conf)
+    is_loaded = true
+end
+
+return M
diff --git a/lua/Trans/conf/window.lua b/lua/Trans/conf/window.lua
new file mode 100644
index 0000000..6f49f3f
--- /dev/null
+++ b/lua/Trans/conf/window.lua
@@ -0,0 +1,52 @@
+local M = {}
+local conf = require("Trans").conf.view
+
+local get_float_opts = function(float_conf)
+    local columns = vim.o.columns
+    local height = vim.o.lines - vim.o.cmdheight - float_conf.top_offset
+    local width = math.floor(columns * float_conf.relative_width)
+
+    return {
+        relative = 'editor',
+        col = math.floor((columns - width) / 2), -- 两侧的宽度
+        row = float_conf.top_offset,
+        title = 'Trans',
+        title_pos = 'center',
+        style = 'minimal',
+        width = width,
+        height = height,
+        border = float_conf.border,
+        zindex = 50,
+    }
+end
+
+local get_cursor_opts = function(cursor_conf)
+    local opts = {
+        relative = 'cursor',
+        col = 2,
+        row = 2,
+        title = 'Trans',
+        title_pos = 'center',
+        style = 'minimal',
+        border = cursor_conf.border,
+        -- TODO keymap to convert style to Float
+        focusable = false,
+        zindex = 100,
+    }
+    if cursor_conf.style == 'fixed' then
+        opts.width = cursor_conf.width
+        opts.height = cursor_conf.height
+    elseif cursor_conf.style == 'relative' then
+        opts.width = (cursor_conf.width > 0 and conf.width < conf.max_width) and conf.width or conf.max_width
+        opts.height = (cursor_conf.height > 0 and conf.height < conf.max_height) and conf.height or conf.max_height
+    else
+        error('unknown style!')
+    end
+    return opts
+end
+
+M.get_float_opts = get_float_opts(conf.float)
+
+M.cursor_opts = get_cursor_opts(conf.cursor)
+
+return M
diff --git a/lua/Trans/content.lua b/lua/Trans/content.lua
new file mode 100644
index 0000000..e69de29
diff --git a/lua/Trans/display.lua b/lua/Trans/core.lua
similarity index 97%
rename from lua/Trans/display.lua
rename to lua/Trans/core.lua
index 2b41cca..08676d6 100644
--- a/lua/Trans/display.lua
+++ b/lua/Trans/core.lua
@@ -8,9 +8,6 @@ local order      = conf.order
 local auto_close = conf.auto_close
 local view       = conf.view
 
--- TODO : setup database
-local db_path = require("Trans").conf.db_path
-local dict = require("Trans").db:open(db_path)
 
 local highlight = {
     word     = 'TransWord',
@@ -23,6 +20,7 @@ local highlight = {
     en       = 'TransEn',
 }
 
+
 local function get_select()
     local s_start = vim.fn.getpos("'<")
     local s_end = vim.fn.getpos("'>")
@@ -46,12 +44,7 @@ local function get_query_res(method)
     else
         error('unknown method')
     end
-
-    -- TODO : dict query optimization
-    local res = dict:select('stardict', {
-        where = { word = arg },
-    })
-    return res[1]
+    -- FIXME 
 end
 
 M.TransLate = function(opts)
diff --git a/lua/Trans/database/init.lua b/lua/Trans/database/init.lua
new file mode 100644
index 0000000..a20baf6
--- /dev/null
+++ b/lua/Trans/database/init.lua
@@ -0,0 +1,29 @@
+local M = {}
+local _, db = pcall(require, 'sqlite.db')
+if not _ then
+    error('Please check out sqlite.lua')
+end
+
+-- INFO : init database
+local path = require("Trans").conf.db_path
+local dict = db:open(path)
+
+-- INFO :Auto Close
+vim.api.nvim_create_autocmd('VimLeavePre', {
+    group = require("Trans.conf.base").autogroup,
+    callback = function ()
+        if db:isopen() then
+            db:close()
+        end
+    end
+})
+
+M.query = function (arg)
+    -- TODO : more opts
+    local res = dict:select('stardict', {
+        where = { word = arg },
+    })
+    return res[1]
+end
+
+return M
diff --git a/lua/Trans/init.lua b/lua/Trans/init.lua
index 909bd06..828a1be 100644
--- a/lua/Trans/init.lua
+++ b/lua/Trans/init.lua
@@ -1,29 +1,13 @@
 local M = {}
 
-M.conf = require("Trans.conf")
+M.conf = {}
+
 function M.setup(conf)
-    conf = conf or {}
-    for k, v in pairs(conf) do
-        if type(v) == 'table' then
-            M.conf[k] = vim.tbl_extend('force', M.conf[k], v)
-        else
-            M.conf[k] = v
-        end
+    M.conf = conf or {}
+    if conf.base and not conf.base.lazy_load then
+        require("Trans.conf.loader").load_conf()
     end
-    M.conf = vim.tbl_extend('force', M.conf, conf)
     require("Trans.setup")
 end
 
-local res = vim.fn.executable('sqlite3')
-if res ~= 1 then
-    error('Please check out sqlite3')
-end
-
-local status, db = pcall(require, 'sqlite.db')
-if not status then
-    error('Please check out sqlite.lua')
-end
-
-M.db = db
-
 return M
diff --git a/lua/Trans/setup.lua b/lua/Trans/setup.lua
index 18d4e16..9bf3250 100644
--- a/lua/Trans/setup.lua
+++ b/lua/Trans/setup.lua
@@ -1,26 +1,18 @@
-local db = require("Trans").db
+if vim.fn.executable('sqlite3') ~= 1 then
+    error('Please check out sqlite3')
+end
 
-vim.api.nvim_create_user_command('TranslateCursorWord', require("Trans.display").query_cursor, {
+vim.api.nvim_create_user_command('TranslateCursorWord', require("Trans.core").query_cursor, {
     desc = '翻译光标下的单词',
 })
-vim.api.nvim_create_user_command('TranslateSelectWord', require("Trans.display").query_select, {
+vim.api.nvim_create_user_command('TranslateSelectWord', require("Trans.core").query_select, {
     desc = '翻译选中的单词',
 })
-vim.api.nvim_create_user_command('TranslateInputWord', require("Trans.display").query_input, {
+vim.api.nvim_create_user_command('TranslateInputWord', require("Trans.core").query_input, {
     desc = '翻译输入的单词',
 })
 
-vim.api.nvim_create_autocmd('VimLeavePre', {
-    group = vim.api.nvim_create_augroup("Trans", { clear = true }),
-    pattern = '*',
-    callback = function()
-        if db:isopen() then
-            db:close()
-        end
-    end,
-})
-
-local highlights = require("Trans").conf.highlight
+local highlights = require("Trans.conf").ui.highligh
 for highlight, opt in pairs(highlights) do
     vim.nvim_set_hl(0, highlight, opt)
 end
diff --git a/lua/Trans/util/debug.lua b/lua/Trans/util/debug.lua
new file mode 100644
index 0000000..874954b
--- /dev/null
+++ b/lua/Trans/util/debug.lua
@@ -0,0 +1,35 @@
+local M = {}
+
+-- INFO : get loaded debug conf
+local base = require("Trans").conf.base
+local debug = require("Trans.conf.default").conf.base.debug
+if base and base.debug then
+    debug = vim.tbl_extend('force', debug, base)
+end
+
+M.type_check = function (types)
+    if debug.enable and debug.type_check then
+        vim.validate(types)
+    end
+end
+-- local function dedent(lines)
+--     local ind_size = math.huge
+--     for i, _ in ipairs(lines) do
+--         local i1, i2 = lines[i]:find("^%s*[^%s]")
+--         if i1 and i2 < ind_size then
+--             ind_size = i2
+--         end
+--     end
+--     for i, _ in ipairs(lines) do
+--         lines[i] = lines[i]:sub(ind_size, -1)
+--     end
+-- end
+--
+-- function M.dedent(s)
+--     local lst = vim.split(s, "\n")
+--     dedent(lst)
+--     return table.concat(lst, "\n")
+-- end
+
+
+return M
diff --git a/lua/Trans/window.lua b/lua/Trans/window.lua
deleted file mode 100644
index e02eb5c..0000000
--- a/lua/Trans/window.lua
+++ /dev/null
@@ -1,48 +0,0 @@
--- TODO  different style to display
-local M = {}
-
-M.float_opts = function(conf)
-    local columns = vim.o.columns
-    local height = vim.o.lines - vim.o.cmdheight - conf.top_offset
-    local width = math.floor(columns * conf.relative_width)
-
-    return {
-        relative = 'editor',
-        col = math.floor((columns - width) / 2), -- 两侧的宽度
-        row = conf.top_offset,
-        title = 'Trans',
-        title_pos = 'center',
-        style = 'minimal',
-        width = width,
-        height = height,
-        border = conf.border,
-        zindex = 50,
-    }
-end
-
-M.cursor_opts = function (conf)
-    local opts = {
-        relative = 'cursor',
-        col = 2,
-        row = 2,
-        title = 'Trans',
-        title_pos = 'center',
-        style = 'minimal',
-        border = conf.border,
-        -- TODO keymap to convert style to Float
-        focusable = false,
-        zindex = 100,
-    }
-    if conf.style == 'fixed' then
-        opts.width = conf.width
-        opts.height = conf.height
-    elseif conf.style == 'relative' then
-        opts.width = (conf.width > 0 and conf.width < conf.max_width) and conf.width  or conf.max_width
-        opts.height = (conf.height > 0 and conf.height < conf.max_height) and conf.height  or conf.max_height
-    else
-        error('unknown style!')
-    end
-    return opts
-end
-
-return M
diff --git a/lua/Trans/window/content.lua b/lua/Trans/window/content.lua
new file mode 100644
index 0000000..1b86632
--- /dev/null
+++ b/lua/Trans/window/content.lua
@@ -0,0 +1,18 @@
+local M = {}
+
+--[[
+content = {
+    lines = {}          ---@type string[]
+    highlight = {}
+}
+--]]
+---@param contents string[]
+M.set = function (win, contents)
+    vim.validate {
+        contents = { contents, 'table' },
+    }
+    -- TODO 
+end
+
+
+return M
diff --git a/lua/Trans/window/display.lua b/lua/Trans/window/display.lua
new file mode 100644
index 0000000..567149b
--- /dev/null
+++ b/lua/Trans/window/display.lua
@@ -0,0 +1,29 @@
+local M = {}
+local api = vim.api
+local util = require("Trans.window.util")
+M.buf = util.init_buf()
+
+--- 浮动窗口的风格
+---@param conf table 自定义配置
+M.show_float_win = function(conf)
+    vim.validate {
+        conf = { conf, 'table' },
+    }
+    local opts = util.get_float_opts(conf)
+    local win = api.nvim_open_win(M.buf, true, opts)
+    return win
+end
+
+M.show_cursor_win = function(conf)
+    vim.validate {
+        conf = { conf, 'table' },
+    }
+    local opts = util.get_cursor_opts(conf)
+    local win = api.nvim_open_win(M.buf, true, opts)
+    return win
+end
+
+-- TODO <++> more window style
+
+
+return M
diff --git a/lua/Trans/window/init.lua b/lua/Trans/window/init.lua
new file mode 100644
index 0000000..e69de29