An electric kettle, comprising: a power supply base; and a kettle main body removably placed on the power supply base wherein the kettle main body has: a container; a heater provided on the container; a water amount sensor that detects an amount of water in the container; a water temperature sensor that detects a current temperature of the water in the container; and a first display part that displays information on the amount of water detected by the water amount sensor, the power supply base has: a power supply cable to be connected to a utility power supply an operation part that receives a user operation concerning a desired temperature of the water; a power supply circuit that generates a driving power for the heater from an electric power supplied from the utility power supply; and a second display part that displays at least one of the current temperature and the desired temperature, and the kettle main body includes a battery that drives the water amount sensor and the first display part when the kettle main body is separated from the power supply base. wherein the kettle main body has a first control part that controls the first display part to turn off the first display part when the current temperature falls to a threshold after reaching the desired temperature, and the power supply base has a second control part that controls the second display part to turn off the second display part when the current temperature falls to the threshold after reaching the desired temperature. a power supply base; and a kettle main body removably placed on the power supply base wherein the kettle main body has: a container; a heater provided on the container; a water amount sensor that detects an amount of water in the container; a water temperature sensor that detects a current temperature of the water in the container; and a first display part that displays information on the amount of water detected by the water amount sensor, the power supply base has: a power supply cable to be connected to a utility power supply an operation part that receives a user operation concerning a desired temperature of the water; a power supply circuit that generates a driving power for the heater from an electric power supplied from the utility power supply; and a second display part that displays at least one of the current temperature and the desired temperature, and the kettle main body includes a battery that drives the water amount sensor and the first display part when the kettle main body is separated from the power supply base. a container; a heater provided on the container; a water amount sensor that detects an amount of water in the container; a water temperature sensor that detects a current temperature of the water in the container; and a first display part that displays information on the amount of water detected by the water amount sensor, the power supply base has: a power supply cable to be connected to a utility power supply an operation part that receives a user operation concerning a desired temperature of the water; a power supply circuit that generates a driving power for the heater from an electric power supplied from the utility power supply; and a second display part that displays at least one of the current temperature and the desired temperature, and the kettle main body includes a battery that drives the water amount sensor and the first display part when the kettle main body is separated from the power supply base. a power supply cable to be connected to a utility power supply an operation part that receives a user operation concerning a desired temperature of the water; a power supply circuit that generates a driving power for the heater from an electric power supplied from the utility power supply; and a second display part that displays at least one of the current temperature and the desired temperature, and the kettle main body includes a battery that drives the water amount sensor and the first display part when the kettle main body is separated from the power supply base.