The invention discloses a mobile intelligent information service system, an adaptation converting device and an adaptation converting method. The device comprises an access unit for receiving a data packet from different mobile communication terminals, or for transmitting the data packet to different mobile communication terminals, and a self-adaptive unit for performing protocol analysis on the received data packet and converting the data packet into a uniform data structure, or for converting the data packet with the uniform data structure into a data packet of the data structure with a specific communication network access manner and transmitting the data packet to the access unit, wherein the different mobile communication terminals are provided with different communication network access manners. According to the invention, a uniform data structure is provided for the mobile intelligent information service system. A plurality of types of mobile terminals flexibly and adaptively access the mobile intelligent information service system.