One-card system applicable to residential area

The invention discloses a one-card system applicable to a residential area. The one-card system comprises an identification card, a service terminal and a background processor, wherein the identification card carries identification information; the service terminal is used for reading the identification information of the identification card and sending the identification information and a function request to the background processor; the service terminal comprises an access control service terminal, an identity identification terminal, a vehicle management vertical, a clubhouse consumption terminal and a shopping consumption terminal; and the background processor is connected with the service terminal and used for checking the identification information and returning a request result to the service terminal according to the function request after successfully checking. The one-card system disclosed by the invention can perform access control service, identity identification, vehicle management, clubhouse con