A method with a warning function includes: determining whether an electronic device is in a first preset state, wherein, the first preset state of the electronic device can be a state that the electronic device is being charged or a state in which the temperature of the electronic device is greater than a preset temperature; determining, when the electronic device is in the first preset state, whether the electronic device is contacted by a user via a sensing unit; controlling, when the electronic device is contacted by the user, a timer to record a contact duration; determining whether the contact duration recorded by the timer is greater than a first preset time; and controlling, when the contact duration is greater than the first preset time, a prompt unit to generate a warning signal.