Image projection apparatus and operation method thereof

A image projection apparatus comprising:

• an image projection unit to project an image;
• a sensing unit configured to sense least one distance to an image projection area to which an image is projected, wherein the image projection area comprises a moveable image projection surface and the at least one distance comprises a first distance to the moveable image projection surface;
• and
• a control unit configured to:
• determine, based on the sensed at least one distance, an image projection state including a state of the image projection area and a space between the image projection apparatus and the image projection area;
• control the image projection unit to project the image to the image projection area based on the determined image projection state;
• detect a change in the image projection state;
• and
• adjust the projected image if a distance to a new image projection surface is greater than the first distance.