The utility model relates to a temperature monitoring furnace kiln. The temperature monitoring furnace kiln comprises a melting bath of which the inner bottom side inclines, wherein a refractory brick outer furnace wall is arranged on the outer side of the melting bath; a feeding hole is formed in the front end of the bottom of the melting bath; a discharge channel is formed in the tail end of the bottom of the melting bath; a heater is arranged inside the discharge channel; liquid level monitoring equipment which is communicated with the melting bath is arranged on the outer furnace wall; the liquid level monitoring equipment comprises a vertical liquid level tube; a high liquid level hole and a low liquid level hole which are communicated with the inner cavity of the melting bath are formed in the liquid level tube; a liquid level tube branch is arranged on the liquid level tube; one end of the liquid level tube branch is connected with the liquid level tube and the connection position is higher than the high liquid level hole; the other end of the liquid level tube branch is a constant-pressure gas inlet; a detection branch is arranged on the liquid level tube branch; the detection branch is connected with a pressure monitor.