Digital Evidence Management (DEM) is a management system designed to collect, store, query, and analyze the digital evidence such as videos, audios, and photos from integrated docking stations (IDS), body worn cameras (BWCs), or other terminals. Adopting a microservice architecture, the DEM supports local deployment and cloud-based deployment. Providing rich services such as evidence management, map-based evidence, evidence tags, and data analysis, the DEM is widely used in areas including public safety, security emergency, firefighting, transportation, and energy.