The invention relates to a demand and calculation model association verification method and system, a storage medium and equipment, and aims to solve the technical problems of large workload, error proneness and untimely updating caused by data non-intercommunication between a demand model and various calculation models in a scheme design process of a current liquid rocket engine system. The method comprises the following steps: 1, constructing a demand model and a plurality of calculation models; 2, establishing association between the demand model and the calculation model; 3, updating design parameters of the demand model to the calculation model; 4, solving the calculation model; 5, comparing the calculation result of the calculation model with the performance parameters of the demand model, and if the requirement is met, ending; and if the requirements are not met, adjusting the calculation model or the demand model, and returning to the step 3 until the requirements are met. The system comprises a demand model module, a calculation model module, a variable association module, a parameter reference module and a demand verification module.