Main goal of the project CZELTA (CZEch Large-area Time coincidence Array) is to study global properties of high-energetic cosmic rays. To present date, project consists of 5 stations covering large area in the Czech republic capable of detection of extensive air showers with energy exceeding 1014 eV. Such a network of distant stations can be an ideal tool for probing global structure of cosmic rays. We present the design of the detection system and obtained results.