Iron pots can be traced back to the edo period, which has been hundreds of years. Today, in addition to the southern iron, there is still continuous creation and production. Nowadays, Kyoto ironware, which has attracted much attention, has been cut off due to the changes in Japanese tea culture during the Showa period. Therefore, the Kyoto iron bottle with copper cover system like Long Wentang has a history of at least several decades. In the past one or two hundred years, iron pots have been very popular in Japan. Almost every household will use an iron pot, and beautifully made iron pots are often given as noble gifts to relatives and friends. Boiling water in an old iron pan will adsorb chloride ions in the water on the one hand, and release iron ions in the water boiled in the iron pan on the other hand, which can supplement the iron needed by the human body every day, and can also prevent and reduce hypertension, which is very helpful to people with hypertension. Boiling water in an old iron pot can raise the water temperature, soften the water quality, and make the water sweet and smooth, with a thick, full and smooth taste. When drinking good tea, you can get more points with half the effort, which is especially suitable for making old tea or cooking tea. Because pig iron is used as raw material, through casting and the author's artistic purpose, the special culture of the old iron pot has been formed. You can use it as a healthy daily boiler or as an art appreciation or antique collection. The value of iron pots varies greatly due to the fame and skill of the producers. Judging from the current collection market price, the price of the old iron pot is cheaper than that of the modern famous iron pot. The storage of old iron pots in Japan is also getting less and less, and the price is soaring.