A mobile phone apparatus has a camera module which increases in temperature by a focusing operation. A processor acquires a correlation coefficient of a lens position including a numerical value of a focal length as a numerical value correlating with a lens position of a focus lens. Furthermore, the processor converts the focal length into an object distance, and starts to count a time when the object distance is equal to or less than a threshold value. Then, the processor suspends the focusing operation by a camera module when the counted time reaches a time-out period.