Micro-energy network realizes the complementary of distributed energy production according to the characteristics of users’ energy demand and local resource conditions. In order to realize the efficient operation of micro-energy network group, this paper proposes an optimal energy transfer model based on multi-energy collaboration in micro-energy network group. The concept of micro-energy network group is given and the basic structure of micro-energy network group based on the interconnection of external energy hubs is first established. Then, the micro-energy network model of internal energy hub and optimal energy transfer model are established. The optimal energy transfer model of micro-energy network group is subdivided into two operation phases, the multi-energy transfer optimization within micro-energy network and between micro-energy network. Phase 1 is to address the problem of energy shortage at the micro-energy network, while the phase 2 is to solve the problem that phase 1 failed to address through the coordination of multiple energy hubs in the micro-energy network group. Finally, the model is validated by a system including electricity, gas, heat /cooling load and external energy hub.