The invention provides an application program debugging method and an application program debugging device. The method comprises the following steps of: calling a debugging interface to establish connection with a target virtual machine, wherein a target application program runs in the target virtual machine; registering a debugging event request into the target virtual machine, wherein the debugging event request is acquired by packaging a concern point in the target application program; and initially acquiring event queue from the target virtual machine, and outputting debugging information corresponding to the debugging event request according to event queue. The device comprises a connecting module, an event registration module and a processing module. According to the method and device, the application program can be debugged without the support of a source code.