Quantum dots (QDs) and localized surface plasmon resonance (LSPR) are promising technologies for biomedical applications, offering unique optical properties that can be harnessed for enhanced imaging, sensing, and therapy. Owing to their size-tunable fluorescence and photostability, quantum dots enable high-resolution imaging at the cell and molecular levels. Their small size and high surface area allow for functionalization with various biomolecules, facilitating targeted delivery and enhancing bioavailability in specific tissues or cells. Moreover, localized surface plasmon resonance, which occurs when light interacts with metal nanoparticles, can significantly amplify signals, enabling ultrasensitive detection of biomolecules and other target analytes. In combination, QDs and LSPR offer a synergistic approach to advancing biomedical technologies. For example, QDs can be used as fluorescent markers in conjunction with LSPR-enhanced sensors to detect biomarkers at lower concentrations than traditional methods allow. Additionally, the unique properties of QDs and LSPR nanoparticles enable their use in novel therapeutic applications, such as photothermal therapy, where localized heating induced by plasmonic nanoparticles can be used to selectively ablate cancer cells. This chapter explores the integration of quantum dots with localized surface plasmon resonance in the context of various biomedical applications, such as imaging, biosensing, and therapy. This highlights the advantages and challenges associated with the combination of these technologies, with a focus on future prospects and potential improvements in the field of nanomedicine.