Fecha de publicación: 08/01/2021 Fuente: Wipo "BigData" The invention relates to an information service system based on big data and a control method thereof, and belongs to the technical field of computer science. The system comprises a data acquisition module, a collection module, a preprocessing module, a big data storage library, a data screening module, an information service module, a wireless communication module and a user terminal which are connected in sequence, the system further comprises an encryption module and a decryption module, the two ends of the encryption module are connected with the information service module and the wirelesscommunication module, and the two ends of the decryption module are connected with the wireless communication module and the user terminal. According to the information service system based on the big data, classification, comparison and summarization preprocessing is carried out through the preprocessing module, then the information service system is stored in the big data storage library, and the later data retrieval and extraction efficiency is greatly improved.