This paper analyzes the new demands of smart grid modeling， including new power sources such as renewable energy， new electrical loads such as the electric vehicle and new network structures such as the self-healing grid. A new line of thought on future power system modeling is presented: element modeling will combine with holistic modeling， offline modeling will develop into online modeling， centralized modeling will develop into hierarchical modeling， entire system modeling will develop into subregional modeling， mechanism model will develop into hybrid model that combines the mechanism and non-mechanism model， and deterministic model will develop into stochastic model. Finally， specific research contents of modeling the renewable energy generation， the microgrid and the hybrid loads are discussed at length.