Abstract: There is provided an API publishing system, in which an application device includes a first storage module having a first executable program stored thereon, and a first processor capable of calling the first executable program to acquire API characteristic information, generate a standard API document, and push the standard API document to a receiving device; the receiving device includes a second storage module having a second executable program stored thereon, and a second processor capable of calling the second executable program to acquire and parse the standard API document; and a service management device includes a third storage module having a third executable program stored thereon, and a third processor capable of receiving and displaying the API characteristic information. An API information pushing method, an acquisition method for API characteristic information, an API publishing method, an application device, a receiving device and a service management device are further provided.