The invention discloses an ignition burner. The ignition burner comprises an inner air pipe, two ends of which are provided with an air inlet and an air outlet. The ignition burner further comprises an outer combustion gas pipe, a sprayer, an ignition electrode, and a flame stabilizing ring. The outer combustion gas pipe is arranged on the inner air pipe in a sleeving mode. A cavity is formed between the outer combustion gas pipe and the inner air pipe. Two ends of the outer combustion gas pipe are provided with a combustion gas inlet and a combustion gas outlet. The air outlet is located in the outer combustion gas pipe and close to the combustion gas outlet. The sprayer is connected to the combustion gas outlet. The ignition electrode is arranged in the inner air pipe. The end part of the ignition electrode extends out of the combustion gas outlet and is arranged in the sprayer. A support porcelain ring used for supporting the ignition electrode is arranged on the ignition electrode in a sleeving mode. The flame stabilizing ring is arranged in the combustion gas outlet and connected to the sprayer. The invention further discloses an ignition system with the above ignition burner. The ignition system is simple in structure. By adoption of the ignition burner, flames can stably burn and a stable ionic current signal is detected.