Provided is a no-water display fire hydrant device, comprising a water release valve (1) and a fire-control connector (2); the water inlet connector (3) of the water release valve (1) is provided with a water display device (4); the water display device (4) comprises a display screen (5) and a floating display device (6); the display screen (5) is provided with a sealed cavity (7); the sealed cavity (7) comprises a display cavity (8) and a transparent view screen (9); the display cavity (8) is internally provided with a no-water marker (10) and an alarm telephone number (11); the floating display device (6) comprises a float (13), a first guide rod (14), a first guide sleeve (15), and a baffle (16); the baffle (16) is located inside the display cavity (8), and the baffle (16) is located in front of the no-water marker (10) and the alarm telephone number (11); the first guide sleeve (15) is fixedly connected to the water inlet connector (3); the first guide rod (14) is movably fitted inside the first guide sleeve (15); the baffle (16) is fixedly connected to the float (13); people can observe, from the water display device (4) of the no-water display fire hydrant device, whether the fire hydrant has water; if the fire hydrant has no water, the water display device (4) displays an alarm repair dialog, and any person can immediately inform a maintenance department to come for service, thus eliminating the risk of the fire hydrant having no water.