Abstract: 【Objective/Meaning】Pleurotus eryngii is the most traded type of edible mushrooms in Taiwan. However, most scholars only studied its cultivation technology, ignoring its industrial index significance in the market of edible mushrooms. The thesis was to make up for the lack of research on the price of edible mushrooms in Taiwan. 【Methods/Procedures】According to the statistical data of monthly average price of pleurotus eryngii published by the “Trading Station of the Wholesale Market of Agricultural Products of Taiwan Executive Yuan”, Census X12 seasonal adjustment method and HP filter method were used to study the fluctuation of price from January 2003 to August 2019. 【Results/Conclusions】In general, the price of pleurotus eryngii was gradually stable. Among them, the trend component has experienced “two ups and two downs” and was in the downward trend at present. The amplitude and length of the periodic component both decreased on the whole, but both of them increased gradually in the last period. Furthermore, the relevant countermeasures were proposed to promote the sustainable development of the industry, including innovating the technology, improving the industrial chain and enhancing the brand value, etc.