Abstract: An exemplary signal collection system includes a signal transmitting module and a computer. The signal transmitting module outputs a high-speed signal with a high frequency. The signal collection system further includes a data collection module interconnecting the signal transmitting module and the computer. The data collection module includes a frequency reduction unit. The frequency reduction unit reduces the frequency of the high-speed signal output from the signal transmitting module and outputs the high-speed signal with a reduced frequency to the computer. A signal collection method based upon the signal collection system is also disclosed.