1. An object sensing method of a construction machine, comprising: (A) setting a safe-distance area and obtaining location values of at least one fixed object to form a work area pattern, wherein the location values are obtained using a sensing sensor mounted at a side of the construction machine; (B) updating the location values by detecting an object in the work area pattern in accordance with rotation and movement of the construction machine; (C) determining whether the detected object is a fixed object in the work area pattern; and (D) notifying that there is an object detected in the work area pattern when it is determined that the detected object is not the fixed object.