The invention discloses an active service system and method for front windshield sight line adjustment in a vehicle networking environment in the technical field of vehicle driving service. The systemis composed of an intelligent vehicle-mounted device and a background service center which transmit information to each other through a 5G communication module; the intelligent vehicle-mounted deviceis composed of an information collecting device, a vehicle operating system and a vehicle-mounted computer, and the vehicle operating system comprises a demister, a water sprayer and a wiper; the background service center comprises a server group, a database, a second data storage unit and a feature extraction and analysis learning center; the server group can receive data and query requests transmitted by the vehicle-mounted computer, conduct retrieval in the database and output data results to the vehicle-mounted computer. An automatic identification and active push mode is adopted, the generation of mist can be prevented in advance by switching on the demister, the speed of the wiper can be automatically adjusted, foreign matter on a front windshield is automatically judged, and then the water sprayer or the wiper is switched on, so that the driving safety and comfort of a driver are improved.