To supply solidified material as a molten liquid without deterioration of quality from a storing tank to the last even if the operation is stopped due to power failure or the like to solidify material decreased in quantity in the storing tank in constitution where the material solidified in the storing tank is heated to be molten by a heater and the molten liquid is automatically supplied to a use point.

This melting and liquefying supply equipment 1 includes a circulation line (a main pipe 10, a pipe 12, a pipe 12 and the main pipe 10, a pipe 13 and the pipe 14) for taking the molten liquid from the storing tank 2 and returning the same to the storing tank, a line heater LH provided in the circulation line, and a supply line diverging from the circulation line to be connected to the use point UP. The storing tank 2 is composed of at least two storing tanks 2A, 2B switched to be connected to the circulation line, and the tanks are connected to each other by a communicating pipe 19, the corresponding end parts of which are inserted in the upper part of each storing tank.