The invention relates to a method for detecting the scale inhibiting property of a metal surface subjected to heat exchange. The method comprises the following steps: preparing sodium bicarbonate standard solution and calcium chloride standard solution as scale forming solution, performing a blank experiment and a scale inhibiting experiment, and calculating the scale inhibiting rate eta (%); adopting a controllable low-power heating probe to simulate the heat exchange surface of a heat exchange system, immersing the probe in a scale forming medium, taking out the probe after heating for a period of time, cooling and drying the probe to room temperature, then weighing, and evaluating the scale inhibiting effect of scale inhibiting technology through the quality of a scale sample adhered to the surface of the heating probe. Compared with the prior art, the method can be used for better simulating the scale forming and scale inhibiting condition on the metal surface subjected to the heat exchange, and is suitable for the property evaluation of solubilizing type and non-solubilizing type scale inhibiting technology.