This book summarizes the recent advancements for drug delivery systems (DDS) in terms of fundamental principles, rapidly emerging techniques and developing frontiers of molecular imprinting. Especially with the combination of enantioselective molecularly imprinted polymers and water compatible molecularly imprinted polymers, stimuli responsive imprinted DDS have been innovated and applied to dermal delivery, ophthalmic drugs and cancer treatment. This philosophy comprehensively revolutionizes the treatment strategy of human healthcare and provides the possibility to re-trigger in vivo an exhaust system after the complete release of the starting drug cargo, thus enabling precision medicine.