The invention provides a water leakage survey plan making device, a system and a water leakage survey plan making method, wherein a water leakage survey plan of a better cost performance can be made out on the premise that whether the water leakage occurs or not cannot be determined. According to at least one selected from the water leakage information, the pipeline information and the survey/maintenance information, the predicted model information within the predicted region is generated. Based on the predicted model information, the predicted water leakage information within the region is generated. Based on the predicted water leakage information, the water leakage survey plan is made out. The water leakage survey plan comprises the application sequence of the water leakage plan. The predicted water leakage information is generated based on the predicted value of the expectation value and the nondeterminacy of the water leakage.
