To support Zhejiang Province to plan a long-term deep decarbonization strategy, identify key emission reduction policies and pilot and demonstration projects, World Resources Institute (WRI) and Zhejiang Development & Planning Institute are carrying out the "Research on 2050 Deep Decarbonization Pathway in Zhejiang Province". The team applies the Energy Policy Simulator (EPS) to quantify and evaluate the emission reduction effects, costs, and social benefits of possible emission reduction policies in Zhejiang Province. This technical note introduces the EPS model methodology, data sources, scenario settings, and limitations etc., and presents simple analysis results. The detailed analysis on emission pathway and policy recommendations are documented in the report Accelerating the Net-Zero Transition: Strategic Action for China’s 14th Five-Year Plan.