Sovereignty state should bear the responsibility to protect its people. If a country cannot or will not protect its citizens, international community should offer and undertake the responsibility to protect. As the mechanism of the responsibility to protect has been sprouting and developing, and it has been lack of dynamical, the mechanism of the responsibility to protect should be established on the basis of shared idea and existing norm. In the aspect of effect and purpose direction, proper causality idea and analysis method should be formed, so as to find out and offer the most proper content and way of protection action in the separate case. To solve dynamical of the mechanism of the responsibility to protect, on the basis of gradually developing idea and norm on “obligation erga omnes” undertaken by sovereignty state for whole international community, we should gradually develop idea and norm on “the responsibility to protect” legally undertaken by whole international community for sovereignty state and its people, so that we can make the mechanism of the responsibility to protect generate dynamical of implement in the course of international community gradually developing towards integration and whole.