A guidance system comprising: a survey apparatus that surveys an object from a point of view that differs from a point of view of a user; a display portion that displays the object from the point of view of the user; a survey apparatus-side imaging apparatus that images the object from a survey point of view of the survey apparatus; and a user-side imaging apparatus that images the object from the point of view of the user; wherein the guidance system is configured to: irradiate a selected area of the object in a principal component direction thereof with the ranging light of the survey apparatus, receive the reflected ranging light from the object, and perform principal component analysis to detect a first principal component; irradiate the selected area of the object in a direction perpendicular to the principal component direction with the ranging light of the survey apparatus, receive the reflected ranging light from the object, and perform principal component analysis to detect a second principal component; compare the first principal component with the second principal component to estimate a shape of the object, select an irradiation pattern suitable for the estimated shape, and acquire three-dimensional information of the object by executing the irradiation pattern with the ranging light of the survey apparatus and receiving reflected ranging light from the object; and based on information on a relative positional attitude between the survey apparatus-side imaging apparatus and the user-side imaging apparatus, change survey information of the object having been surveyed by the survey apparatus to the point of view of the user and displayed on the display portion. a survey apparatus that surveys an object from a point of view that differs from a point of view of a user; a display portion that displays the object from the point of view of the user; a survey apparatus-side imaging apparatus that images the object from a survey point of view of the survey apparatus; and a user-side imaging apparatus that images the object from the point of view of the user; wherein the guidance system is configured to: irradiate a selected area of the object in a principal component direction thereof with the ranging light of the survey apparatus, receive the reflected ranging light from the object, and perform principal component analysis to detect a first principal component; irradiate the selected area of the object in a direction perpendicular to the principal component direction with the ranging light of the survey apparatus, receive the reflected ranging light from the object, and perform principal component analysis to detect a second principal component; compare the first principal component with the second principal component to estimate a shape of the object, select an irradiation pattern suitable for the estimated shape, and acquire three-dimensional information of the object by executing the irradiation pattern with the ranging light of the survey apparatus and receiving reflected ranging light from the object; and based on information on a relative positional attitude between the survey apparatus-side imaging apparatus and the user-side imaging apparatus, change survey information of the object having been surveyed by the survey apparatus to the point of view of the user and displayed on the display portion. irradiate a selected area of the object in a principal component direction thereof with the ranging light of the survey apparatus, receive the reflected ranging light from the object, and perform principal component analysis to detect a first principal component; irradiate the selected area of the object in a direction perpendicular to the principal component direction with the ranging light of the survey apparatus, receive the reflected ranging light from the object, and perform principal component analysis to detect a second principal component; compare the first principal component with the second principal component to estimate a shape of the object, select an irradiation pattern suitable for the estimated shape, and acquire three-dimensional information of the object by executing the irradiation pattern with the ranging light of the survey apparatus and receiving reflected ranging light from the object; and based on information on a relative positional attitude between the survey apparatus-side imaging apparatus and the user-side imaging apparatus, change survey information of the object having been surveyed by the survey apparatus to the point of view of the user and displayed on the display portion.