The present invention combines laser pulse ranging method with data collection techniques. Said device includes transmitted wave input channel, echo input channel, triggering input channel, transmitted wave amplification unit, operating, echo amplification unit, triggering unit, transmitted wave analog-to-digital conversion unit, echo analog-to-digital conversion unit, control calculation and synchronization unit, memory, interface unit, system clock, and upper computer. Said process mainly includes: beginning, initialisation, self-checking, standby, command, collecting instructing, triggering signal, collecting transmitted wave signal, echo over threshold, calculation transition time, compression and storage data, and ending collection. Said invention is suitable for moving mode continue laser ranging, laser radar and conventional data collection application system.