<p>This process monitoring and diagnosis device is provided with: a data collection and storage means (2) for collecting and storing time-series data of multiple measurement variables measured by process sensors (121 to 1221); a principal component calculation means (42) capable of defining the same number of principal components as the measurement variables, by multivariate analysis that does not differentiate between inputs and outputs; an output variable specification means (43) for specifying one or more output variables from the multiple measurement variables; an output-related principal component extraction means (44) for extracting principal components that have an effect on the output variables specified by the output variable specification means (43) from within the principal component calculation means (42); a summary statistic monitoring means (62) for calculating and monitoring predefined summary statistics for detecting anomalies by using the principal components extracted by the output-related principal component extraction means (44); and a summary statistic anomaly determination means (63) for determining whether or not there are anomalies in the statistics being monitored by the summary statistic monitoring means (62).</p>
