The prime goal of this article is to discuss on Recommendation for important of the methodology of OMO. There is a some step for the methodology of OMO. The steps are like as Identifying the Evidence, Selecting the Best Available Evidence, Critical Appraisal, Objectively Reporting the Evidence, Basing Conclusions on the Evidence, Updating Daily etc. Open market operation that means omo is following this methods which is very important. This process allows immediate and comprehensive access to the best available evidence as it occurs.