A laser projection module, comprising: a laser emitter configured for emission in a laser emission direction; a collimation element arranged in a laser emission direction of the laser emitter and configured to collimate the laser emission; a diffractive optical element arranged in a position subsequent to the collimation element along the laser emission direction of the laser emitter, and configured to diffract the laser emission collimated by the collimation element to form a laser pattern; and a temperature detection element arranged adjacent to the laser emitter and configured to detect a temperature of the laser emitter, wherein the laser projection module further comprises a substrate assembly, the substrate assembly comprises a substrate and a circuit board carried on the substrate, and the laser emitter is carried on the substrate, wherein the circuit board is provided with a hole through the circuit board, both the laser emitter and the temperature detection element are carried on the substrate and received in the hole through the circuit board and the hole through the circuit board has a size larger than a sum of sizes of the laser emitter and the temperature detection element in a direction perpendicular to the laser emission direction of the laser emitter, or wherein the circuit board is provided with a hole through the circuit board, the laser emitter is carried on the substrate and received in the hole through the circuit board, and the substrate is provided with a blind hole through the substate, a position of the hole through the substrate is opposite to a position where the laser emitter is carried on the substrate, and the temperature detection element is received in the hole through the substrate, the hole through the circuit board has a size larger than a size of the laser emitter in a direction perpendicular to the laser emission direction of the laser emitter, and the hole through the substrate has a size larger than a size of the temperature detection element in the direction perpendicular to the laser emission direction of the laser emitter. a laser emitter configured for emission in a laser emission direction; a collimation element arranged in a laser emission direction of the laser emitter and configured to collimate the laser emission; a diffractive optical element arranged in a position subsequent to the collimation element along the laser emission direction of the laser emitter, and configured to diffract the laser emission collimated by the collimation element to form a laser pattern; and a temperature detection element arranged adjacent to the laser emitter and configured to detect a temperature of the laser emitter, wherein the laser projection module further comprises a substrate assembly, the substrate assembly comprises a substrate and a circuit board carried on the substrate, and the laser emitter is carried on the substrate, wherein the circuit board is provided with a hole through the circuit board, both the laser emitter and the temperature detection element are carried on the substrate and received in the hole through the circuit board and the hole through the circuit board has a size larger than a sum of sizes of the laser emitter and the temperature detection element in a direction perpendicular to the laser emission direction of the laser emitter, or wherein the circuit board is provided with a hole through the circuit board, the laser emitter is carried on the substrate and received in the hole through the circuit board, and the substrate is provided with a blind hole through the substate, a position of the hole through the substrate is opposite to a position where the laser emitter is carried on the substrate, and the temperature detection element is received in the hole through the substrate, the hole through the circuit board has a size larger than a size of the laser emitter in a direction perpendicular to the laser emission direction of the laser emitter, and the hole through the substrate has a size larger than a size of the temperature detection element in the direction perpendicular to the laser emission direction of the laser emitter.