Method and apparatus for filtering point-of-sale data.

(-- 57) summary -- the technique for collecting only phenomenon data selected in the point-of-sales system (12), in order to avoid the burden which collects and processes all points-of-sale data. The present invention makes possible the filter of the phenomenon data in a point-of-sale (38) according to either of much filter forms (50). Therefore, in order to support various applications, such as inventory control, shelf space space assignment, pricing sensitivity analysis, and goods sales promotion analysis, the filter of the sales transaction can be carried out on an item level (54 (a)). The filter of other forms -- register operating status (54 (b)) and a system event -- and, mistake and (54 (c)) It is specified in order to support analysis of payment action operation (54 (d)), consumer Japanese 録取引 (54 (e)), random purchase (54 (f)), and user specification dealings (54 (g)). In order for a part of such applications called consumer Japanese 録操作 (54 (e)) to make the surveillance of purchase dealings (42) induce, customer identification data is used for it. The application of other forms, such as inventory control, shelf space space assignment, or pricing sensitivity analysis, does not include customer identification information.