Abstract: Aiming at the problem of poor management and sharing o agricultural information, and there are security risks when using network cloud storage, the agricultural network cloud storage information system was designed, and the asymmetric encryption method of cloud storage was studied. The agricultural network cloud storage information system was mainly constituted of presentation layer, logic layer, interface access layer, storage layer and encryption layer. To ensure the security of the agricultural network cloud storage information system, the RSA algorithm in the asymmetric encryption algorithm was used to encrypt the data, it included the design and improvement of the structure of the asymmetric encryption algorithm, and the specific algorithm was designed. In order to verify the performance of the system, the functional operation and performance test were carried out. The test results show that the system functions run stably, and the data processing speed is fast, which could meet the needs of users.