Firstly, it is difficult to accurately measure the water consumption of each household of urban residents by sharing the master meter. In the process of using water for urban residents, due to the aging of equipment and the damage of underground pipes, there is a phenomenon of running, flowing, dripping and leaking, which makes the water consumption calculated by the common meter generally inconsistent with the total water consumption of all residents, that is, the water consumption calculated by the common meter is larger than the total water consumption of all residents, which is called water consumption. Considering that it is not clear which household or section of pipeline or gate valve produces the water consumption, the water consumption can only be shared equally by all urban residents, otherwise the water company will bear the losses and generate losses. Some residential users have to share the average value of water consumption even when they have been away for two months. If a drop of water is not used, they have to share the average value of water consumption, which is obviously unreasonable. It will also greatly damage the initiative and enthusiasm of residents to save water, and it is not conducive to the saving and utilization of urban water resources.