The existing laser-correlated imaging echo based on full waveform sampling experiences the problem of requiring a large amount of collected data for echo, and the limitation of the sampling rate to ranging accuracy and resolution. We propose a new ghost imaging technology based on time-over-threshold (TOT) technology to address this problem. A time width or peak inverse method based on the TOT technology is proposed to obtain the intensity information of the echo signal. The influences of the threshold choice of TOT, laser pulse width, and the measurement error of the ghost imaging reconstruction performance are also studied. Numerical simulation and experimental results demonstrate that the proposed technology can achieve laser correlation imaging. When the threshold is set to 35% of the maximum echo signal, the laser width is wider than 30 sampling intervals, and the root-mean-square error of the measurement error is not greater than 1 sampling interval, the reconstruction quality can be guaranteed. In addition, the method of obtaining the intensity information of echo signal based on peak inverse is more accurate than the time width method based on TOT.