Abstract: A collision detecting method, an electronic device, and a computer program product thereof are provided for the electronic device having an accelerometer, a positioning module, and a communication module. The method includes obtaining a plurality of acceleration variations within each of a plurality of sampling intervals respectively detected by the accelerometer. The method also includes transforming the corresponding acceleration variations into a plurality of frequency domain signals for each sampling interval, and calculating energy and entropy of the frequency domain signals. The method further includes determining a collision has occurred if the energy and the entropy corresponding to each of a plurality of specific sampling intervals among the sampling intervals both drastically increase then drastically decrease suddenly.