AbstractIt is challenging but of practical meaning to provide adsorbents with multiple responsive properties. Here, we report an intelligent microporous polymeric adsorbent constructed by block copolymer‐grafted microporous polymer nanospheres. With its multi‐stimuli‐responsive functions, the adsorbent shows rapid fluorescent response to temperature, pH, and organic reagents. Moreover, it also demonstrates super‐fast adsorption of pollutants in water, enabling efficient treatment of wastewater.