In this paper, we attempt to review and sort out the development of two typical types of plasmonic-sensing-on-fiber-tip technologies, and discuss the focus for future work and potential values for application. The first type is surface plasmon resonance (SPR) sensing structures, especially surface plasmon cavities, integrated on optical fiber end-facets. They can be applied to small volumes of samples and achieve biomolecule sensing in a dip-and-read manner. They can also be inserted into narrow spaces for ultrasound endoscopy. In the future, how to solve the problem of low content detection in complex crude samples while upholding the core values of convenience and rapidness, is the critical challenge for fiber SPR sensor development in order to find real application values in medical diagnosis and agriculture product inspection. On the other hand, to greatly improve SPR devices' sensitivities to acoustic signals is the key to achieving fiber SPR hydrophone arrays with high application values. The second type is plasmonic antennas integrated on tapered optical fibers' apexes. Combined with scanning probe microscopy technologies, these probe devices render high precision and dynamic tuning of plasmonic antennas, and high resolution scanning microscopy by using plasmonic hotspots to strongly interact with and map the samples. In the future, through innovative research on the antenna probes and the to-be-measured quantities, the scope of physical and chemical phenomena that can be characterized is expected to be further expanded, and the characterization performance is expected to significantly improve.