Abstract: Pipelines are buried underground and gathered into a network. Underground utility corridors are the "core" projects in urban development and construction, and are an important part of urban safety. With the acceleration of the construction of underground utility corridors, their operation and maintenance inspection issues have become increasingly prominent. The underground utility corridor is a closed space with changeable climate, accompanied by the production of toxic and harmful gases, and the inspection mileage is long, which poses a challenge to traditional manual operations. In response to the development of new quality productivity, this article designs and produces an automatic inspection and fire-fighting robot for underground utility corridors. The principles are systematically analyzed and the design and development are completed. Finally, it is deployed in a certain power utility corridor and relevant tests are carried out. The test results are as expected.