Abstract: In order to solve the problems of single function of railway data center operation and maintenance monitoring system at all levels, untimely information sharing, and low degree of visualization, this paper designed an operation and maintenance data visualization system suitable for railway data centers based on the Three.js engine, implemented automatic patrol inspection of data center, shortened the alarm response time and problem processing time, and provided real-time, standardized, quantitative, and accurate operation and maintenance data visualization services for data center operation and maintenance, patrol inspection, management personnel, and accurately, timely and effectively monitored, warned and managed the data center, reduced data center operation and maintenance costs, and improved data center operation and maintenance security.