diff --git a/README.md b/README.md
index e7aa439..3271515 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,91 @@
 # AssetBase
+  
+Sample Unity project to set a new project with 'dll' contains Singleton, EventBus, Infinity ScrollView etc.  
+It can help to set your unity project.
 
+# Documentation
+
+This project has a sample scripts how to use library functions.  
+You can check functions and explanations here.
+
+## Singleton
+This is a basic singleton design pattern script.  
+I made two types of singleton that has DontDestroyOnLoad or not.
+
+**- UnitySingleton**
+- Singleton with DontDestroyOnLoad.  
+- Basic singleton script.
+```c#
+public class YourClass : UnitySingleton<YourClass>
+{
+    //your class codes
+}
+```
+
+**- UnitySingletonOnce**
+- Singleton without DontDestroyOnLoad
+- This script and object will be removed when scene has changed.
+```c#
+public class YourClass : UnitySingletonOnce<YourClass>
+{
+    //your class codes
+}
+```
+
+## EventBus
+This is a eventbus design pattern script.  
+You can subscripe your own event(class) and send data to the subscribing object when you publish event.
+
+EventBus class is using 'Singleton', so you can access by Instance.
+
+**- Subscribe<T>(EventDelegate<T> callback) where T : EventBase**  
+**- Unsubscribe<T>(EventDelegate<T> callback) where T : EventBase**
+- Add or Remove a generic type of event class inheriting 'EventBase'.
+- You can send to the listener with class data.
+
+This is a sample event class.
+```c#
+public class MyEvent : EventBase
+{
+    public int _value1;
+    public object _value2;
+    ...
+}
+```
+
+This is a sample listener script.  
+You can Subscribe, Unsubscribe events and define functions when your event published.
+```c#
+public class Listener : MonoBehavior
+{
+    private void OnEnable()
+    {
+        EventBus.Instance.Subscribe<MyEvent>(OnMyEvent);
+    }
+    private voi OnDisable()
+    {
+        EventBus.Instance.Unsubscribe<MyEvent>(OnMyEvent);
+    }
+
+    private void OnMyEvent(MyEvent e)
+    {
+        //action when your event has publised.
+    }
+}
+```
+
+**- Publish(EventBase eventType)**  
+This is how you can publish with data.  
+You can send any data sealed with class.
+```c#
+public class Publisher : MonoBehavior
+{
+    private void OnCommand()
+    {
+        EventBus.Instance.Puplish(new MyEvent());
+    }
+}
+```
+  
+**- Clear()**  
+This will be used when you need to clear all subscribtions.