A smart mattress for night care for the elderly based on ZigBee technology is designed. The smart mattress uses flexible membrane pressure sensor and temperature sensor to realize the care of the sleep of the elderly at night. When only the flexible membrane pressure sensor of the mattress has a pressure value and the detected temperature is within the human body temperature range, it is determined that the elderly are sleeping in bed, so as to achieve the goal of nursing; And through wireless networking, real-time transmission of data is realized. The system uses the CC2630 wireless radio frequency chip as the core, and designs the hardware and software of the node and sensor interface in the ZigBee wireless sensor network. The whole system has good performance and high precision, which can better meet the requirements of intelligent care of the elderly at night.