This present disclosure provides a method for automatic production line planning based on an Industrial Internet of Things, a system and a storage medium. The method comprises: an instruction generation module configured to generate an adaptation instruction based on production item data; a production adaptation module configured to generate a target adaptation scheme; and obtain an adaptation result by adapting the plurality of target production lines; wherein the production adaptation module is further configured to: obtain a production line code corresponding to each target production line; obtain a process code corresponding to each production process; construct a plurality of initial adaptation schemes; and perform multiple rounds of iterative updates to determine the target adaptation scheme; a feedback module configured to determine feedback results according to the adaptation results; and a process configuration module configured to perform process configuration on the plurality of target production lines to obtain the production line.