Abstract:In recent years,with the continuous development of China's Internet cloud computing,cloud computing technologies have been applied in many fields.In view of the traditional instrument in the field of petrochemical storage tank fluid exists within the irrigation pressure detection precision is poor,temperature sensing sensitivity low and narrow tank liquid state data analysis level,cloud computing is put forward under the petrochemical tank farm tank liquid instrument design.Through the large data computing core framework to build,on this basis,using PCJD air density difference algorithm and micro cloud is feeling the heat source computing unit and data technology,the traditional tank liquid instrument for design improvement,from the root to solve.Through the simulation experiment proves that the proposed under the cloud of petrochemical tank farm with irrigation fluid pressure in the tank liquid instrument design feedback data accuracy is high,temperature sensing high sensitivity,fast liquid tank comprehensive data analysis,data analysis,high integrity,etc.