I want to purse master's degree,is it ok or not ?And is there any problem !

Hi Premalatha. You can study Psychology after the graduation in computer science. You can opt for bsc psychology also. The basic eligibility criteria for bsc in psychology is 10+2 with 50% marks. But, sometimes some institutions have some other eligibility criteria. You can check that in the eligibility criteria of a college/university that you are interested in.

Some top colleges that offer Psychology are:

Lady Shri Ram College for Women.
Jesus and Mary College
St. Xavier's College
Presidency College, Chennai
CHRIST (Deemed to be University) Sophia College for Women
Kamala Nehru College for Women
Mithibai College of Arts

Dear Premalatha, you haven't mentioned whether you want to pursue a Bachelor's degree or a Master's degree. For PG,  few Universities prefer candidates who have studied Psychology as a subject and for UG, they prefer Science Students. However few Universities don't have such specifications. IGNOU is one amongst them. As you have already studied your Bachelors, you can pursue your Masters from IGNOU without having Psychology as a subject. And IGNOU is a well known University too.