International Real-Time Magnetic Observatory Network (INTERMAGNET) and Magnetic Data Acquisition System (MAGDAS) are ground-based magnetometer networks developed to study the space weather and monitor the geomagnetic variations. A MAGDAS-II type magnetometer was installed at Penang recently for seismic monitoring. The MAGDAS (PEN) station is newly established, the reliability of the magnetometer had to be tested. The test is conducted by comparing its data with geomagnetic data obtained from another well-established magnetometer system. Therefore, this research is conducted to study the reliability of the newly installed MAGDAS system by comparing geomagnetic data with the INTERMAGNET system. The closest INTERMAGNET station that was chosen for this study is Dalat, Vietnam. The available data from November 2019 to July 2020 are selected to analyse the geomagnetic components H, D, and Z variations obtained from both stations. The result of the variations will be discussed briefly in the result and discussion part of this paper. The variations of the geomagnetic component of the newly installed MAGDAS magnetometer are verified to be reliable data for the geomagnetic field monitoring.