The invention provides embedded child electrocardiogram monitoring equipment and system. P waves, PR segments, QRS waves, ST segments and T waves of each ECG are recognized, the obtained P waves, PR segments, QRS waves, ST segments and T waves are put into corresponding wave band arrays respectively, a mark array is newly built, and the number of elements of the mark array is the same as that of the wave band arrays;the similarity between the P wave, the PR section, the QRS wave, the ST section and the T wave and the corresponding typical wave band is calculated, the element at the corresponding position of the flag array is set to be 1 when the similarity is smaller than a threshold value, and the occurrence time of the wave band is recorded; and a subscript of which the flag array element is 1 is acquired, elements corresponding to the subscript in the P wave array, the PR segment array, the QRS wave array, the ST segment array and the T wave array are combined into an ECG wave, and the ECG wave and wave band generation time in a second storage unit are stored. In addition, the invention further provides a QRS wave identification method in the ECG. The transmission quantity of the ECG data can be effectively reduced, and the user experience is improved.