A method of incinerating waste liquid utilizing industrial combustion equipment, comprising the steps of examining a pre-application inspection item (171), a pre-application prerequisite item (172), and an application examination item (173) and performing a post-application operation item (174) and a post-application check item (175) to eliminate a dioxin producing environment, whereby dioxin can be prevented from occurring in the incinerating treatment of waste liquid utilizing the industrial combustion equipment. |