Objective To explore the clinical effects of cardiac remote monitoring system in diagnosing arrhythmia. Methods All 410 patients with arrhythmia who were admitted and treated in our hospital from October 2010 to July 2013 were selected as research subjects. All patients were examined by routine 12 leads ECG,followed by cardiac re-mote monitoring system. Positive rates of the two examinations in the diagnosis of arrhythmia were compared and ana-lyzed. Results In 1d, 2d and 3d, positive rates of cardiac remote monitoring system in the diagnosis of sinus arrhyth-mia, atrial arrhythmia, atrioventricular junction arrhythmia, ventricular arrhythmia and heart block gradually in creased,and the differences of positive rates of the same disease in different days were statistically significant(P<0.05). Positive rates of cardiac remote monitoring system in the diagnosis of the above diseases in 1d were all significantly higher than those of routine 12 leads ECG, and the differences compared between the two methods were statistically significant (P<0.05). Conclusion Sensitivity of cardiac remote monitoring system in the diagnosis of arrhythmia is higher than that of routine 12 leads ECG. The system is able to reduce the rate of missed diagnosis of arrhythmia and is of great clinical value in reducing the rate of missed diagnosis of arrhythmia, which is worthy of clinical promotion and application.