AS i have been trying to develop WEB PART in Visual Studio . As i need your aid to develop Sharepoint Solution for Sharepoint 2013. 

I have installed SP2013 on window server 2008 R2 with SQL Server 2012 on the server machine. I need to know , either VS2013 or VS2012 have to install on the server to develop Sharepoint solution?

I am looking forward your valuable answer. I have searched it a lot in Google about this requirement but I didn't get clear content. So I am awaiting your answer to make me to develop Sharepoint webpart solution.

Thanks in advance.