This master's thesis analyzes and designs implementation of the system for handheld devices like Motorola MC1000. These devices will be used for retrieving information from remote workplace. Data is transformed through SQL database and XML interface by using other parts of the system into economical software, where invoices are created, items are accounted or other operations could be done. This economical software provides some tables like products, warehouses and other information needed for the operation. Best use of the system is in warehouses of companies where products are identified by barcodes, which can be read by handheld device. One can create various documents using this system like conveyances, issue cards, receive cards etc. The next level, which is economical software, is responsible for processing of documents. The whole system is made-to-measure for software Pohoda from Stormware s.r.o. Nevertheless it can be used with another economical, accounting or similar software without any problem.