An electric appliance comprising: a communication device connected with a smart grid net to receive electric power information including billed power-rate for each time period and a highly billed power-rate time period in which the billed power-rate is a predetermined reference or more; a sensing device configured to sense an operation mode and an operation state according to the operation mode; and a control device configured to implement power-saving operation based on the received electric power information and the operation state sensed by the sensing device, wherein the control device is further configured to, in case the highly billed power-rate time period starts during the operation of the power consuming part required to implement the operation mode: put on standby the operation of the power consuming part until the highly billed power-rate time period finishes, if the remaining operation time or the remaining number of cycles of the power consuming part is equal to or larger than a predetermined time or a predetermined number, respectively, and complete the operation during the remaining operation time or the remaining number of cycles, if the remaining operation time or the remaining number of cycles of the power consuming part is smaller than the predetermined time or the predetermined number, respectively. a communication device connected with a smart grid net to receive electric power information including billed power-rate for each time period and a highly billed power-rate time period in which the billed power-rate is a predetermined reference or more; a sensing device configured to sense an operation mode and an operation state according to the operation mode; and a control device configured to implement power-saving operation based on the received electric power information and the operation state sensed by the sensing device, wherein the control device is further configured to, in case the highly billed power-rate time period starts during the operation of the power consuming part required to implement the operation mode: put on standby the operation of the power consuming part until the highly billed power-rate time period finishes, if the remaining operation time or the remaining number of cycles of the power consuming part is equal to or larger than a predetermined time or a predetermined number, respectively, and complete the operation during the remaining operation time or the remaining number of cycles, if the remaining operation time or the remaining number of cycles of the power consuming part is smaller than the predetermined time or the predetermined number, respectively. put on standby the operation of the power consuming part until the highly billed power-rate time period finishes, if the remaining operation time or the remaining number of cycles of the power consuming part is equal to or larger than a predetermined time or a predetermined number, respectively, and complete the operation during the remaining operation time or the remaining number of cycles, if the remaining operation time or the remaining number of cycles of the power consuming part is smaller than the predetermined time or the predetermined number, respectively.