I am electrical engineer some people tolled me that it is the wastage of time at bayet so please kindly let me know is it good for job or not dear.?

Well , it depend on many factors , the more active member the more and top visible

just use it as one of  your jobs finding gates , do not totally relied on it  

  keep refresh/ update your information , ask your Colleagues recommendations , try to make your resume  more professional and simple , and it'll work .. 

:)  

I got some  interview calls through Bayt. I think it is good job site for gulf region. All the best.

THANKS DEAR AND I ATTACHED MY CV OF WORD FILE IS IT OK OR I CHANGE IT TO PDF OR OTHER FORMAT

No, it's a very good jobs site, if you build your CV in a good way and clear to the employer. you will be contacted by the employer.