Construction industry is one of the branches of industry with the greatest accident hazard, and this is confirmed by the statistics of the State Labour Inspection (PIP) and the Statistical Office (GUS). The number of accidents in construction industry grows from year to year. Considering the accident figures in the construction industry, changes have to be introduced in the work safety management system immediately using modern ways. The work safety management system developed by EkoLan, a developer operating in the Tricity of Gdansk, Sopot and Gdynia, is an interesting solution. At EkoLan, an original work safety management system has been implemented for many years at construction sites managed by that company. The article presents and discusses both the principles of operation of the system and the results from two summers of research on the systems in practical conditions.