Combined cooling, heating and power (CCHP) microgrid is a typical application of integrated energy system, microgrid planning is the basis to improve the performance of microgrid system considering the integrated demand response.Based on the coupling, complementarity, alternation and interaction among different forms of energy such as gas, electricity, cold and heat in the microgrid, the specific models of energy storage equipment, controllable load (reducable load, translatable load),convertible load are established which are the integrated demand response (IDR) implementation in microgrid system, the system energy flow is established, and an optimal allocation model of microgrid capacity considering IDR is established, costs are considered comprehensively, including annual equivalent investment cost, annual fuel cost, annual operation and management cost and annual IDR cost, the IDR constraints and reliability constraints are taken into account in the constraints. The results of multi-scenario comparison in the example show that IDR improves the allocation economy and reliability of system, promotes the consumption of renewable energy, the correctness and rationality of the model are verified.