diff --git a/README.md b/README.md
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+++ b/README.md
@@ -48,6 +48,16 @@ We don't intend to spend more time entangled with tony qu. After discussing with
 
 ---
 
+## What is NPOI ?
+
+NPOI is the .NET version of POI Java project at http://poi.apache.org/. POI is an open source project which can help you read/write xls, doc, ppt files. It has a wide application.
+
+For example, you can use it to
+* generate a Excel report without Microsoft Office suite installed on your server and more efficient than call Microsoft Excel ActiveX at background;
+* extract text from Office documents to help you implement full-text indexing feature (most of time this feature is used to create search engines). 
+* extract images from Office documents
+* generate Excel sheets that contains formulas
+
 ## Install NuGet Package
 
 ```powershell
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 6f215e2..b458523 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -30,6 +30,15 @@ This project is for NPOI Core. NPOI is still under at [https://github.com/tonyqu
 
 ---
 
+## 什么是 NPOI？
+
+NPOI 是 [Apache POI](https://github.com/poi) 项目的 .NET 版本。POI 是一个开源项目，能帮助你读/写 xls、doc、ppt 等文件。它具有广泛用途，如：
+
+* 在服务器未安装 Microsoft Office 套件的情况下生成 Excel 报告，并且比在后台调用 Microsoft Excel ActiveX 效率更高；
+* 从 Office 文档中提取文本，以帮助你实现全文索引功能（大多数情况下，此功能用于创建搜索引擎）；
+* 从 Office 文档中提取图像；
+* 生成包含公式的 Excel 工作表。
+
 ## 安装 NuGet 包
 
 ```powershell