With the continuous advancement of agricultural modernization, farmland irrigation has become an important link in agricultural production. However, in some areas, there is a problem of transformer overload during the peak irrigation period. To address the above issues, a mobile transformer system has been introduced, which has the advantage of being able to flexibly connect different transformers according to demand. In order to maximize its efficiency, it is necessary to determine the order in which each transformer is connected to the mobile transformer system. Therefore, this article has developed an indicator system that reflects the urgency of transformer energy supply in agricultural irrigation areas. Firstly, an in-depth study was conducted on the irrigation situation of farmland in a certain region of China, and a large amount of data was collected. Then, considering the issue of dimensionality between different data, a large amount of data was normalized to avoid the impact of dimensionality on data processing. Next, a complete indicator system was developed by comprehensively considering factors such as heavy overload transformer data, circuit network, load data, meteorological data, etc. Finally, the Analytic Hierarchy Process was used to determine the weights of each primary and secondary indicator in the indicator system.