Time-gated timing-selective Raman spectroscopy technique is a Raman spectroscopy technique that precisely controls the timing relationship between the laser pulse duration and the detector shutter timing so as to carry out timing selection to collect Raman signals and suppress background interference. In the field of remote Raman detection, the use of time gating can effectively block the ambient light, so that the Raman spectrum to obtain excellent signal/noise ratio. This paper systematically introduces the time-gated time-sequence selective Raman technology and its applications, which focuses on the technical characteristics and prospects of picosecond time-gating. Finally,This paper introduces the first backpack-type miniaturised remote Raman spectroscopy equipment independently developed by our team in China, which can detect ≤1 μg within 0~2 m and typical explosives and hazardous chemicals targets ≤1 mg within 13 m, and has a broad application prospect in the monitoring of industrial leakage, prevention of terrorist attacks and explosion-proof demining and other aspects of public safety warning and monitoring.