Team,

I want to design and provide solution for exchange 2013 please help me. 

Complete design migration guide.

Forums are not a good place for broad questions such as these. I would recommend hiring a consultant.

Otherwise, I would search and read all about Exchange high avail and performance and use the Exchange Deployment Asst:

https://technet.microsoft.com/en-us/office/dn756393.aspx?f=255&MSPPError=-2147217396

and the Exchange Mailbox Calculator

https://gallery.technet.microsoft.com/office/Exchange-2013-Server-Role-f8a61780