The invention relates to a car insurance calculation quotation service system based on the mobile internet. The car insurance calculation quotation service system based on the mobile internet is characterized by comprising a Wechat public platform basic engine module, a mutual information management module, a communication authentication module, a rapid car insurance calculation module, an insurance policy amendment module, an insurance policy generation module, an order generation module, an online payment module, a data synchronization interface module and an interface machine communication service module. By the utilization of the mobile internet attribute of Wechat, fragmented time can be utilized for using the related service rapidly, conveniently, effectively, anytime and anywhere, and therefore the car insurance calculation quotation service based on the mobile internet is provided through Wechat, service staff can directly provide an insurance solution and the offer for users on the spot, the service deal making efficiency is increased, and the service cost is lowered.