The invention relates to an input redirection method and system based on an Android system remote desktop, and the system is divided into two parts: the first part provides a data communication process from a client to a server, and comprises a data communication module, a data encryption and decryption module, a client input information obtaining module, and a desktop audio and video transmissionmodule; and the second part provides a specific method and principle of input redirection, and the core is an input redirection module. According to the invention, the input data is reconstructed directly from the source to the equipment node, the data is redirected directly to the Android equipment node, and then is acquired, processed and distributed by the IMS module of the Android system, sothat the redirection of the input data is realized, and the requirement of a remote desktop for input redirection is met.