An increasing number of scientific publications on magnetic quantum dots (MQDs) have revealed the growing interest of scientific society in this area. MQDs with a size of a few nanometers can show the quantum confinement effect far superior to their bulk counterparts. Quantum confinement enhances the energy of a particle, which depends on excitonic processes and can dramatically change the optical properties of a QDs. Magnetic quantum dots are the combination of the ability of two materials (magnetic nanoparticles and quantum dots) which respond as a universal tool for theragnosis. This review summarizes the optical and magnetic properties of magnetic quantum dots that permit visualization, imaging, magnetic separation and may have a therapeutic benefit. It also highlights the recent advances made in the research field of multifunctional magnetic quantum dots in catalysis, sensor, magnetic resonance imaging, cancer treatment and environmental remediation. Challenges still exist with QDs, especially a major obstacle is toxicity when contemplating various applications.

越来越多的关于磁性量子点（MQD）的科学出版物揭示了科学界对该领域日益增长的兴趣。尺寸为几纳米的 MQD 可以表现出远远优于块体同类材料的量子限域效应。量子限制增强了粒子的能量，这取决于激子过程，并且可以显着改变量子点的光学特性。磁性量子点是两种材料（磁性纳米粒子和量子点）能力的组合，可作为治疗诊断的通用工具。这篇评论总结了光学和磁性量子点的磁性特性可以实现可视化、成像、磁分离，并可能具有治疗益处。报告还重点介绍了多功能磁性量子点在催化、传感器、磁共振成像、癌症治疗和环境修复等领域的研究进展。量子点仍然存在挑战，尤其是在考虑各种应用时的主要障碍是毒性。