A device for remotely looking after the infant is composed of a controller with the selection function between hypnotize mode and sleep mode, radio receiver, hypnotizer and sensor. Its method includessuch steps as choosing hypnotize mode, starting hypnotizer, hypnotizing an infant for a certain time, switching from hypnotize mode to sleep mode, sensing the movement and/or cry of the infant, switching from sleep mode to hypnotize mode and transmitting radio alarm signal to said radio receiver of a responsible person.