In Japan, the elderly is increasing and laborer is decreasing. Many Service robots are need as robots which be able to live with human by many people. In particular, Biped Robot are payed attention to feature which be able to use the facilities, be a friendly appearance, provide general-purpose services, by many people. Biped Robot consumes high energy. Biped Robot always use high energy which give each joint to torque by actuater. From the above, the Biped Robot has a big problem that running time is very short. we have designed a labor saving mechanism which imitates human structure, and thought approach which imitates human action. in the simulation, we created a model to which have approaches and labor saving mechanism. And, we confirmed the amount of change in torque in the analysis. In the simulation, we confirmed that consumed energy is decreased by these approaches and labor saving mechanism we proposed.