Electrocardiogram (ECG) is one of the measured human bio-signals which is used widely in hospitals in order to define the heart activity in real-time basis and to have an overall look on the human health status in a non-invasive way. Many wearable devices and/or sensors for daily basis use are developed to provide real-time continuous monitoring for patient’s health status. Digital data collected using these sensors/devices are stored in different data formats or standards. Therefore, it is a real challenge to ensure data interoperability and compatibility. This topic is to build an online service-based solution running on a linux server which helps to interchange ECG data between different data formats or standards and to provide an analysis of the usage of this service. The full design of the software together with the workflow starting from the state of the art, requirement specification, design, to the implementation and testing should be well-defined.