<p>Disclosed is an automatic analyzing device including a plurality of connected functional modules having different functions and processing capacities, capable of achieving high analysis efficiency on the whole without causing traffic jams. Also disclosed is an automatic analyzing system that does not require consideration for influence on the existing functional modules, rebuilding of conveying plans for improving the entire processing capacity, and the like even when a new functional module is added. Buffer units that are paired to corresponding functional modules are connected to a subject conveying line. A computer of an operating unit issues instructions to the functional modules to convey the subjects in accordance with requests. Operations of carrying in and out the subjects are performed while the buffer units and the functional modules are managed such that the subjects can be conveyed therebetween.</p>
