The invention provides an interaction system and method for improving an application software operation mode. The system comprises a function control device, an intelligent device and a cursor locating device; application software is installed in the intelligent device; the function control device is used for performing function input on the application software; the function control device comprises a function value output module and a controller; the function value output module sends an input instruction signal to the controller, the controller receives and judges an output instruction signal of the function value output module and transmits the output instruction signal to the intelligent device, and single and/or sequential function input of the application software on the intelligent device are realized in one step. Compared with the prior art, the function control device in the interaction system has input modes of multiple forms, a single or multiple function values can be sent to the intelligent device at one time via the function value output module and the controller on the function control device so as to realize fast and accurate operation on the application software.