Nanoscience and technology, which involves the creation of materials from individual atoms and molecules, is one of the most important research fields in modern science. Researchers have used nanoscience and technology to achieve significant developments in life sciences and healthcare, profoundly impacting human society. Nanoparticles refer to particles with diameters between 1–100 nm. The concept of nanotechnology was first proposed by Nobel laureate Richard Feynman in 1959. Subsequently, researchers began studying nanoparticles. In 1984, German scientist Gleiter et al. first successfully produced iron nanoparticles using inert gas condensation, marking the official birth of nanoscience and technology. With the development of nanoscience and technology, nanomaterials, especially Magnetic Nanoparticles (MNPs), have attracted great research interest. MNPs are a new type of nanomagnetic material that not only possesses the four effects of ordinary nanoparticles (surface effect, quantum size effect, small size effect, and macro quantum tunneling effect) but also has special magnetic properties, such as superparamagnetism, high coercivity, low Curie temperature, and high magnetization rate. They have been successfully applied in areas such as magnetic resonance imaging, drug and gene delivery, cancer treatment, biomaterial separation, cell labeling, and imaging.