Based on existing standard dynamic game model of negotiation and bandwagon mechanism, this paper reconstructs a three-stage dynamic game model of standard lifecycle for formation, implement, and diffusion by widening the condition of players of existing model; it attest to the consistency of conclusions for equilibrium condition of standard adoption by comparing new game model with old one, which not only relies on the coordination mechanism used by the players, but also on the relative value they attach to successful coordination, and on the formal standard's performance at the end of the game.