MySql Replication in two directions I am successfully able to set up master-slave replication of database with MySQL. So, whenever I am updating my database on master, It will automatically replicated on the slave. Now, I have situation like, it is also possible that database might be updated on the slave, and it should be replicated on master. Basically, I want the Replication in two direction. 

Please, suggest me some possible ways
This is called as MySQL Master-Master replication.
You can follow these links which can be helpful to you:

1. How to setup Master-Master replication

2. How to setup Master-Master replication

Another way to implement multi-master replication, including circular replication is using MySQL Cluster.

3. MySQL Cluster replication - Multi Master