Abstract: According to the contradiction between public requirements of highprecision location and the limited application of CORS high precision positioning such as surveying and mapping, the design of cloud platforms based on CORS location service, and high concurrent access were introduced, by integrating with internet of things, cloud computing, big data and artificial intelligence. A high precision location differential pool was constructed by grid transformation, so that high currency access and high precision position can be realized in cloud. The cloud platform service tests suggest that, the system operation efficiency increases at least 26 times, the number of current users achieves at least 50 thousand, and the internet RTK／RTD of CORS cloud service is nondestructive in precision.