Disclosed is an image processing apparatus including: an image processor which processes and displays an image signal; a communication unit which transmits a power consumption of the image processing apparatus to a power control server, and receives a message notifying necessary power saving function from the power control server; and a controller which controls the image processor to display a power load warning message and performs a power saving function in response to the power load warning message if the message notifying the necessary power saving function is received. With this, while operation rate of the power plant having high costs is lowered, low carbon emission of the plant may be achieved and a user of the image processing apparatus may reduce power consumption by performing a power saving function.