Embodiments of this application provide a wearable electronic apparatus, a body temperature measurement method, and a wearable electronic device. The wearable electronic apparatus includes a housing, a processor, and a temperature sensor located in the housing. The housing has a sound outlet hole. The temperature sensor includes a first temperature sensor and a second temperature sensor, and the second temperature sensor is located on a side that the first temperature sensor is away from the sound outlet hole. The processor is configured to determine a core temperature of a user based on a thermal equilibrium temperature corresponding to the first temperature sensor and a thermal equilibrium temperature corresponding to the second temperature sensor.