<p>As one class of multifunctional materials, metal-organic frameworks (MOFs) with virtues like large surface area, high porosity, and tailorability have been found in many applications. Particularly, the investigation on health is rapidly growing. Accurate diagnosis and efficient treatment of diseases are increasingly important but challenging. Nanoplatforms based on MOFs are receiving much attention, which has made significant progress in imaging and drug delivery during the past few years. This review article will summarize and discuss the latest development of nanoscale MOFs in the following topics: contrast agents for magnetic resonance imaging (MRI); X-ray computed tomography imaging (CT); optical imaging (OI); photoacoustic imaging (PAI); photothermal imaging (PTI); positron emission tomography (PET); single-photon emission computed tomography (SPECT); and multimodal imaging (MI). In addition, targeting drug delivery by MOFs to treat diseases will be categorized into the followings: cancers; lung diseases; bone diseases; diabetes; infections; wound healing; bowel diseases; Alzheimer’s disease; ocular diseases; and atherosclerosis.</p>