A method and a system for increasing scanning speed are provided. The method may include determining a transmission rate of a transit interface, scanning an original to generate an image data, and adjusting a cycle time of the image data to change a data generating rate responsive to the transmission rate of the transit interface. One aspect of the present disclosure may be by adjusting the cycle time of a state machine to change the data generating rate corresponding to the transmission rate of the transit interface. Therefore, in response to the transmission rate of the transit interface, the cycle time of the state machine may be adjusted to produce the data at a rate that prevents the smearing process. Thus, the possibility of memory buffer full may be reduced, which may lead to the reduction in start-stop processes and therefore the overall scanning speed may be increased without necessarily requiring the increase in size of a memory buffer.