The integrated observation network operational monitoring system is the realtime professional platform for the meteorological observation equipment operational supporting in China. This paper gave the synthesis evaluation index system of meteorological facilities’ operation, maintenance and supporting in the integrated meteorological observation network in China, based on the equipment technique supporting engineering theory. The evaluation index system contained reliability, maintainability, supportability, daily job and economic categories, and then evaluated the integrated meteorological observation network from the facilities’ operational status, parameters, the observation data’s quality, the information transmission, the supply guarantee and the maintenance. Synthesis evaluation index system can not only make the integrated observation system operation stable and reliable, but also can provide information for decision makers and equipment manufacturers to select and to improve equipments in China.