The paper introduces systematically the developing principle ofCWCM 1.0 oil spill model based on Lagrange system and oil spill fate processes in environment, reviews two oil spill incidents of East Ambassador in Jiaozhou Bay and Min Fuel 2 in the mouth of Pearl River, and designs the predict system simulating oil spill applied in contingency plans. It is indicated that CWCM 1.0 has met preliminarily the demands for functions of precision simulating and oil spill predicting, and can plan an important role to support oil spill response.