The online monitoring of water quality still has the problems of a single indicator， unstable results， and low reliability. In this paper， the construction effectiveness evaluation of a sponge city road is conducted with water analysis in manual sampling， combined with the methods of flow monitoring and SWMM modeling. The result shows that the sponge road has significant effects on total runoff control， runoff pollution control， drainage， and water-logging prevention. In a typical year with average precipitation， the annual total-runoff-control rate of the sponge road reaches 94.2%. The runoff-pollution-reduction rates are 88.5% （calculated by SS）， 88.3% （calculated by COD）， 86.7% （calculated by TP）， and 88.5% （calculated by NH3-N）， respectively. And the peak-runoff-reduction rate of stormwater with a 20-year return period reaches 75.2%. This research provides a reference for the examination and assessment of the construction effectiveness of sponge roads.