The Guiding Opinions of the State Council on Promoting the Construction of Urban Underground Comprehensive Pipe Galleries have promoted the construction of an integrated information system for underground pipelines, which are important infrastructure for urban operations. Establishing a perfect urban underground pipeline system that can adapt to the needs of economic and social development, significantly enhance emergency disaster prevention capabilities, is an urgent task facing smart cities and "Internet+" management of urban affairs. There are many key issues to be solved in establishing an integrated management information system for underground pipelines, including their scale, location relationships, property ownership, and operational years. The measurement and determination of the position and spatial relationship of underground pipelines is one of the important issues. Based on the characteristics of concealed engineering and non-metallization of underground pipelines, this project studies "Fiber Optic Gyroscope-Based Underground Pipeline Spatial Positioning Measurement Technology" and applies positioning systems based on fiber optic gyroscopes. By conducting point-to-point measurements inside the pipeline, determine the spatial coordinates or relative coordinates of underground pipelines, and obtain data on the spatial position and positional relationship of underground pipelines; study the construction of an underground pipeline spatial positioning system based on fiber optic gyroscopes; establish methods for solving equations with fiber optic gyroscopes and geographic coordinate calculation methods based on three-dimensional spatial transformations; use optimization techniques such as variable rotation method, simplex method, dynamic programming, etc., to establish algorithms for correcting non-orthogonal and non-overlapping axes in three-dimensional space coordinates; form new technologies for the spatial positioning measurement of underground pipelines. The project is based on urban development needs, addressing key issues in the construction of comprehensive information systems for underground pipelines in smart cities and 'Internet +' urban management, with significant practical significance and social and economic benefits.