As a terminal type of micro integrated energy system, micro energy network is small in scale and easy to implement, which meets the needs of developing an integrated energy system. Consequently, it has great promotion value. In order to better coordinate the economy, energy conservation and environmental protection of micro energy network, this paper first establishes a multi-objective optimal operation model considering the factors of economy, energy and environment. Second, an improved weighted fuzzy method is proposed to transform the above model into a single-objective one, which can be so...