Abstract: A web page control method of integrating, by a computer, a plurality of web pages and outputting the plurality of web pages as a single web page, the web page control method including: acquiring, by the computer, integration definition information for defining the plurality of web pages to be integrated into the single web page; extracting, an input/output relationship between components included in the plurality of web pages of the integration definition information; extracting, a component of the web page being an output destination from the extracted input/output relationship; prohibiting, an operation from being performed on the extracted component being the output destination; extracting, all components of the web page being input sources from the extracted input/output relationship; and permitting, the operation to be performed on the component being the output destination when the operation has been completed on all the components of the web page being the input sources.