To exactly provide the optimum information related to equipment operation in order to improve the skill of equipment operation.

Look-ahead time (predictive time) to present preceding information is determined (100). Next, an operator reads the track of a target to be followed by the operation of equipment (102), a concerned mark position is derived from the look-ahead time by detecting the operation of equipment through an operator OP (104 and 106), data for displaying the target track, concerned mark and its own position on a screen as images are outputted and displayed on the screen, and information is provided for the operator (108). Therefore, the operator can predict the operation to be performed by watching the concerned mark, the track of operation can be easily matched with the target track, and operation can be speedily and smoothly proceeded.