In a laser receiver receiving a laser beam from a laser transmitter and a
laser receiving system composed of a plurality of laser receivers, a
plurality of photo devices are arranged on an acceptance surface so that
acceptance angles of the laser beam thereof are mutually different in
order to detect distances between an acceptance position of a center
point of a received laser beam on an acceptance surface and a reference
point and an elevation angle of the received laser beam from a reference
surface. Also, distance detection means respectively compare acceptance
levels of the photo devices detected by the level detection means with
thresholds, thereby detecting distance between the center point of the
laser beam and the reference point of the acceptance surface by
combination of comparison results thereof. Elevation angle detection
means respectively compare acceptance levels of the photo devices
detected by the level detection means with thresholds, thereby detecting
elevation angles from the reference surface by combination of comparison
results thereof.