The activity of human beings is intricately linked with the activity of the heart. In cases of cardiac ailments, it is imperative to monitor the heart to ascertain the specific area of damage for diagnosis and treatment. Conventional external electrocardiogram (ECG) devices are cumbersome, involving multiple wired connections. Hence, we have developed a low-cost wireless ECG monitoring system to streamline the process, enabling remote data transmission for efficient diagnosis and treatment. In this study, we developed a Low-Cost wireless 7 - 7-channel Electrocardiogram Device based on the ADS1293 chip to measure ECG signals. The ECG signals from ADS1293 are collected and packaged for transmission using an ARM Cortex M0. The cardiac electrical data is transmitted via Bluetooth HC-05. At the receiver end, a Raspberry Pi 3 connects to the Bluetooth HC-05 and receives the data transmitted from the cardiac electrical measurement device. The Raspberry Pi then stores the data in a ring buffer, processes it, and displays it on an LCD screen. The LCD screen displays three signal lines simultaneously and allows for the switching of channels on all three signal paths. As a result, We have successfully created a wireless cardiac electrical measurement device capable of monitoring 7 channels of ECG signal. The device will continue to evolve into a Holter monitor capable of transmitting data remotely to doctors from a distance.