Along with the enactment of Interim Procedures about Service and Management of Car-hailing via Internet，the local governments begin to issue rules for the implementation and the regulation of Car-hailing via Internet has been in the age of post-legislation. The key of the regulation about Car-hailing via Internet is to distinguish Car-hailing via Internet from traditional taxi by setting up market access threshold. As a result，the distinguishing system could be seen as a kind of power system，which includes the central system and local systems and its function mainly reflects the current situation of vehicles, drivers and the way of operation. On the whole, this system regulates the taxi markets; however, it also brings negative effects on passengers, car-hailing apps and the owner of Car-hailing via Internet. Also, this system tends to change for the sake of the pressures from the internal factors, environment and other systems. To optimize this system, measures should be taken to change the mode of thinking and the pattern of regulation.