In this study, a new magnetic material was made by microencapsulating the Temperature-sensitive magnetic fluid. Microcapsules are made by dissolving the organic solvent, polymer, Temperature-sensitive magnetic fluid, dropping it into pure water and stirring with a homomixer. Fluorescence observation of particles and visualization of flow field are performed by mixing fluorescent dye in microcapsules. As the results it was confirmed that microcapsules formed clusters by supplying a magnetic field. It was shown that the flow of microcapsule solution can be visualized by using self - made magnetic capsule containing fluorescent dye. The forced convection flow characteristics were investigated using a 1mm×1mm micro channel.