The invention provides a data acquisition method and device as well as mobile equipment. The data acquisition method comprises the following steps: an input equipment serial number is determined; an event serial number corresponding to the input equipment serial number is determined according to a pre-generated equipment file; data corresponding to the event serial number is acquired according to the event serial number, wherein the corresponding relationship between the input equipment serial number and the event serial number is recorded in the equipment file and is determined after an input subsystem finishes registration. The accurate event serial number can be determined with the method according to the input equipment serial number, so that the accuracy of the acquired input equipment data is guaranteed.