The present invention discloses a gas cylinder weighing type hob, wherein one side of a support carrier is hinged for rotation, and the other side acts on a weight sensor to perform single-side weight detection, the use of only one single weight sensor results in a simpler structure, and a large amount of detection data from the weight sensor may be subject to data fitting to obtain a corresponding equation as a conversion equation of a residual amount of gas in a gas cylinder to detect the residual amount of gas.