A proposal for a disaster monitoring satellite network. The 36-Tiangang (36天罡) satellite constellation is composed of satellites equipped with panchromatic multi-optical, hyperspectral imaging, SAR, and laser multi-beam scanning payloads. When combined with LiDar and high-resolution optical photography from UAVs, the satellite constellation can fulfill the role of low-orbit small remote-sensing satellites. The constellation is flexible and can perform orbital changes quickly, thereby providing fast real-time coverage. Analysis of sensor data is to be carried out by ground stations, providing an integrated monitoring and early warning system for disaster management and emergency response.