The invention discloses an alarming method, device and system of electric heating equipment. The alarming method of the electric heating equipment comprises the steps that the current time and the operation state of the electric heating equipment are obtained, wherein the operation state at least comprises any one of the started state, the stopped state, the energy accumulating state and the faulty state; whether the current time is in an electricity utilization peak period and whether the operation state is the started state are judged; and if the current time is in the electricity utilization peak period and the operation state is the started state, alarming prompt information is generated, wherein the alarming prompt information is used for indicating that the current time is in the electricity utilization peak period. The alarming method, device and system of the electric heating equipment solve the technical problem that in the prior art, when the electric heating equipment is used in the electricity utilization peak period, an alarm cannot be given to a user.