The grayscale B-mode ultrasound image displays the anatomic structure of the heart, while the strain map reflects the mechanical information of the myocardium. The combination of the myocardial color-coded strain map with the grayscale B-mode image benefits the detection of alterations in the myocardium. Objective: This study proposed a fast mapping method of myocardial strain image superimposed onto the grayscale B-mode ultrasound image, i.e. the overall mapping method. Methods: The heart of a health adult male was scanned using Sonix RP ultrasound system for 6 seconds. The ultrasonic RF signals of the left ventricular long-axis view of the heart were recorded for reconstruction of the B-mode image. The displacement and strain maps of the myocardium were obtained respectively using the method of dynamic estimation and analytic minimization and the polynomial linear regression. Then, the color-coded strain map of the myocardium was overall superimposed on the grayscale B-mode ultrasound image. Results: The results indicate that the proposed method in this study is time-saving. To map the strain image over the myocardial region containing 1×106 pixels, it only took 0.24s. The mapping time increases with increase of the number of the myocardial region. It took 2.4s for a myocardial region of 4×106pixels. Conclusion: The proposed method is time-saving and has potentials to observe the deformation and elasticity of the myocardium in real time.