The global rise of antimicrobial resistance calls for new therapeutic approaches that move beyond conventional broad-spectrum antibiotics toward precision-guided nanotherapeutics. This review examines how smart antibacterial nanomedicines achieve better therapeutic outcomes through two key control dimensions: Spatial precision (where) and temporal activation (when). We first discuss active targeting strategies that direct therapeutic payloads to infection sites while sparing healthy tissues. We then analyze microenvironment-responsive mechanisms that keep therapeutic agents inactive until they encounter specific pathological signals. Moving beyond a simple catalog of material properties, we propose a “Hierarchical Intelligence Framework” that organizes nanoparticles along a spectrum of increasing complexity—from basic ligand-guided systems to integrated, logic-responsive nanodevices operating through “Target-Trigger-Treat” protocols. By examining design principles and practical challenges in pharmaceutical development, this work outlines a path toward resistance-overcoming nanomedicines that may reshape infection management in the coming decades.

Antimicrobial resistance  /  Smart nanomedicine  /  Active targeting  /  Stimuli-responsive systems  /  Spatiotemporal control  /  Hierarchical intelligence framework  /  Precision antibacterial therapy  /  Biofilm eradication