In the case where a plurality of analysis data files which respectively contain analysis results and data-analyzing process results for a plurality of samples should be managed as one lot, a portion of the information contained in those analysis data files is extracted and compiled into a final result record report file. This file is registered in a database. A supervisor views the final result record report on a client terminal, evaluates the validity of the analysis result and other contents for each sample, and performs a predetermined operation to execute the signature of approval or other evaluations. Signature information, including the signer's name, date and time of the signature, etc., is recorded for the final result record report file. The same signature information is also recorded for each of the analysis data files located by referring to link information.

In a two-dimensional LC system configured to introduce components trapped in a trap column during a fractionation period T into a second-dimension column, separate components, and then detect the components using a mass spectrometer, a data collection unit receives a signal which indicates timing to delimit the fractionation period T, determines the first data item in the fractionation period T, adds measurement start point identification information to the first data item, and stores all the data in a data storage unit. A two-dimensional chromatogram creation unit recognizes the first data item in each fractionation period T from the read data, and create a two-dimensional chromatogram by aligning data so that the first data items will be aligned at the top along an abscissa.

Data of a plurality of samples collected by an LC/MS, GC/MS or other systems are converted into a two-dimensional table format. After LC/MS measurement data on a plurality of samples are obtained and the respective extracted ion chromatograms (XICs) are created, a time-axis adjustment for correcting a discrepancy in the retention time is performed, followed by a process of correcting the missing of data which has occurred in the head and/or tail section of the data as a result of the time-axis adjustment.