World is very speedily moving towards most hi-tech technology in each factor. Robotic surgery is a new and exciting emerging technology that is taking the surgical profession by storm. Surgical robots have become the essential for centers wanting to be known for excellence in minimally invasive surgery despite the current lack of practical applications. Present work discusses the performance issues of Robotic surgery and spotlight the weak root. The important issue of surgical robots is to deal with fault arise when the surgery is going on. Then try to make surgical robots system more reliable with fault tolerance with design diverse approach. The technique of design diverse applied to Surgical robots system will become more effective to handle faults and enable Surgical robots in reliable mode. Present approach can deal with the software and hardware faults by applying the techniques of software fault tolerance and hardware fault tolerance, respectively.