The invention relates to the field of the Internet of Things, and provides an intelligent meter fee charging method based on the composite Internet of Things (IoT) and an IoT system. The IoT system comprises a user platform, a plurality of service sub-platforms, a plurality of management sub-platforms, a sensing network platform and a plurality of object sub-platforms. After a display numerical value is sent to the management sub-platform via an intelligent meter at a preset moment, and the management sub-platform counts the display numerical values of the plurality of intelligent meters of adistrict, the sum of the display numerical values of the district is compared with an energy use index provided by a governmental service platform to the management sub-platform, a charging scheme ismade, the overall fee of the district is generated, and the user platform can complete payment via a charging platform. Energy conversation of the cell or district can be better supervised by automatically counting the sum of the display values of the cell or district, and charging based on quantity according to the energy index, and policies such as energy conversation and the like can be relatively well implemented through managing the user platform of the cell or district.