The present disclosure provides a method for generating a video frame and a system thereof, including: receiving at least two frames of a video captured by an image capture unit through a network; calculating a first set of optical flow vectors of the at least two frames by a first algorithm; generating a set of modified vectors according to at least one parameter; combining the set of modified vectors and the first set of optical flow vectors to obtain a second set of optical flow vectors; and shifting one of the at least two frames according to the second set of optical flow vectors to generate a virtual image. Therefore, the present disclosure can reduce deviation caused by the latency of the network and improve user experience.