Abstract: A system and a method for identifying baby needs are disclosed. The system stores a heart rate variability (HRV) feature model comprising a relationship between HRV features and baby needs. The system receives a time-series skin image signal of a baby, and converts the time-series skin image signal into a target photoplethysmography (PPG) signal. The system also calculates a set of target HRV features according to the target PPG signal, and determines a target need of the baby according to the HRV feature model and the set of target HRV features.

Abstract: Disclosed is an electric device control system comprising an electric device control system and an intelligent remote control. Each electric device is electrically connected to a light sensing device, wherein the electric device is controlled by the light sensing device. The intelligent remote control comprises a light transmitter, a first wireless communication unit and a first controller. The light transmitter provides a high energy level visible light beam to a light sensing device, to make the light sensing device provide a wireless identification signal. The first wireless communication unit receives the wireless identification signal. The first controller is electrically connected to the first wireless communication unit. The first controller controls a coding set to switch according to the wireless identification signal, and controls the first wireless communication unit according to the coding set to output a wireless control signal to the light sensing device for controlling the electric device.