According to the multi-scale characteristics that the integrated energy service system exhibits on hierarchy and type

this paper builds up each subsystem's model and their logical relationships on the basis of the multi-scale energy system modeling method

by taking the energy flow as the link

from the point of view of system engineering.Then

taking the system annual energy efficiency as the optimization target

the system optimization decision mathematical model was constructed using the particle swarm optimization algorithm.On the premise of satisfying the users' energy demand

considering the constrained conditions like the environmental resources and environmental protection policies

a scientific and rational structure optimization planning and design of the integrated energy service system was realized

which can provide the best energy supply program for decision-makers.