Grain and oil quality sampling is an important work in grain trading, storage and processing. To reserve the process sample and test the quality have important sense to guarantee fair trade and control grain quality in grain storage and processing. To resolve the problem in field grain quality sampling such as lack of regional representation, process fraud and difficulty in grassroots organization building, a field grain quality sampling management mode and relative techniques based on GIS and cloud platform was provided in this article. It not only standardized the sampling process, but also realized a real-time recording and monitoring of sampling process, ensured a fair and just sample testing process, reduced fraud in the process. The sampling and testing result can be easily handled in a visible and direct way. The management style of platform rental can solve the problem of construction fund and technicians shortages at the grassroots level.