An information collecting and inquiring method and system is disclosed. The distributed dynamic information is input to the system via data record terminal. After it is processed, sorted, transmittedand collected in a tree transmission system composed of data processing base stations, repeater stations and central stations, it is stored in one or more data warehouse at central stations, where the abstract information characteristics are stored in a ring transmission system composed of central stations. According to the characteristic information submitted by user, said central station can find the address pointer of needle data and send it to the user. The user can search needed data according to address pointer.