The invention relates to the technical field of product oil management, and discloses a product oil purchase-sale-stock multi-
modal data analysis method and
system. The method comprises the following steps: acquiring real-time
inventory data, transportation state data and sales terminal data in a product
oil supply chain to form a multi-
modal data set; performing data cleaning on the data, and extracting key inventory characteristics to generate a cleaned data subset; obtaining associated historical purchase data, regional demand prediction data and market
price fluctuation data based on the gas
station identification information to form a multi-dimensional auxiliary
data set; inputting the features into an inventory
feature extraction model, generating a multi-
feature vector set, and fusing the multi-
feature vector set; inputting the fused feature vectors into an inventory state evaluation
model set, and outputting inventory early warning level and abnormal type information; and finally, a dynamic allocation scheme is generated by combining real-time
inventory data and the like. According to the method, multi-
modal data are integrated, so that the comprehensiveness and accuracy of
data analysis are improved, and the purchase-sales-
stock management of the product oil is assisted to be more suitable for
market dynamics.