A resident measurement system for measuring a charge level of a blast furnace, disposed at an opening of a lateral furnace wall at the top of the blast furnace, comprising.; a chamber, combined with the furnace wall and covering said opening, wherein said chamber includes: - a pivoting hole; - a servo system, disposed in the chamber, and comprising a power device, a transmission element, and a movable bridge assembly, wherein said power device drives said transmission element, said movable bridge assembly is driven by the transmission element to perform a motion in a first direction according to the transmission element, said movable bridge assembly comprises a slide rod, a slide seat, and a connecting rod, the slide seat rotates according to the slide rod, and one end of the connecting rod is connected to the slide seat; - a distance measurement unit, having a pivot, wherein the pivot is pivotally disposed at said pivoting hole and located within said opening, said distance measurement unit is connected to the other end of the connecting rod, and is driven by the connecting rod to perform a motion with the pivot as a movement center, so as to scan and measure the location and shape of the charge level, said distance measuring unit further comprises a distance measurement device that scans and measures the charge level through a channel element said channel element passes through said pivot and wherein a gap exists between said channel element and said pivot and - a cooling-cleaning unit, connected to said distance measurement unit, for supplying a high-pressure gas, wherein said high-pressure gas is introduced into said blast furnace through said gap between said channel element and said pivot of said distance measurement unit. - a pivoting hole; - a servo system, disposed in the chamber, and comprising a power device, a transmission element, and a movable bridge assembly, wherein said power device drives said transmission element, said movable bridge assembly is driven by the transmission element to perform a motion in a first direction according to the transmission element, said movable bridge assembly comprises a slide rod, a slide seat, and a connecting rod, the slide seat rotates according to the slide rod, and one end of the connecting rod is connected to the slide seat; - a distance measurement unit, having a pivot, wherein the pivot is pivotally disposed at said pivoting hole and located within said opening, said distance measurement unit is connected to the other end of the connecting rod, and is driven by the connecting rod to perform a motion with the pivot as a movement center, so as to scan and measure the location and shape of the charge level, said distance measuring unit further comprises a distance measurement device that scans and measures the charge level through a channel element said channel element passes through said pivot and wherein a gap exists between said channel element and said pivot and - a cooling-cleaning unit, connected to said distance measurement unit, for supplying a high-pressure gas, wherein said high-pressure gas is introduced into said blast furnace through said gap between said channel element and said pivot of said distance measurement unit.