In view of the disadvantages of the traditional theodolite surveying method applied to verticality detection for construction tower crane, a global navigation satellite system (GNSS) based verticality intelligent detection technique in rounds for construction tower crane is proposed. And then, a verticality intelligent detection method in rounds for construction tower crane is designed based on GNSS dynamic detection model and the GNSS-based verticality intelligent detection system in rounds (GNSS_VDS) is designed and developed based on Visual Studio 2017 platform using C# program language. The preliminary experimental results show that the accuracy of intelligent detection in rounds of GNSS_VDS system is better than 3 cm in the horizontal direction and 4 cm in the vertical direction, verifying the effectiveness of the proposed algorithm. The high-precision intelligent solution can be provided for real-time monitoring of anti-toppling stability for construction tower crane.