1. An information collecting system that is connected to, via a network, a data generating device which adds attribute data to generated job-site data and which transmits the job-site data with the attribute data to the network, the information collecting system being configured to generate event information formed by adding supporting information to the job-site data, and the information collecting system comprising: a dictionary storing unit that stores a dictionary which defines a kind of each supporting information to be added to the job-site data; a database that stores pieces of supporting information of various kinds and various contents; a searching unit that searches each supporting information appropriate for a content of the job-site data from the database in accordance with the dictionary; and a primary reconfiguring unit that adds the searched supporting information to the job-site data in addition to the attribute data to reconfigure the event information, wherein: the dictionary records for each kind of the job-site data, a model of the event information; the model is constructed so as to recite information indicating a kind of the supporting information to be added to the event information; the searching unit: reads, from the model corresponding to a kind of the job-site data, information indicating the kind of the supporting information; generates a search key corresponding to the kind indicated by referred information by combining the job-site data contained in the event information reconfigured by the primary reconfiguring unit with each already added supporting information; and searches the supporting information from the database based on the search key; and the supporting information is background information that includes at least one of pieces of information respectively indicating an editing assist material which is necessary for editing the job-site data, a comparison target data to be compared with the job-site data, an analysis assist material which affects an analysis and an evaluation assist material which affects an evaluation on an analysis result.