According to the modeling requirements of electro-optical information systems in joint operations, multi-resolution modeling (MRM) technology for resolving complex system modeling is researched, and the multi-resolution model of the electro-optical information system is built. At first, the typical MRM method is introduced. And then, the MRM design using entity-oriented aggregation and disaggregation method is proposed based on the analysis of the function procedures of the electro-optical information system. At last, the MRM principle is described, the two-layer multi-resolution model including the equipment layer and the system layer is established, and the consistency of the multi-resolution model is discussed.