The invention provides heart magnetic resonance image right ventricle segmentation calculation device and method based on multiple maps. The device comprises an image acquisition module, an image processing module, an image clustering module, a map selection module, a calculation and registration module and a result fusion module. The method for performing segmentation calculation by adopting theequipment comprises the following steps: acquiring a heart magnetic resonance short-axis film image; Preprocessing the heart magnetic resonance short-axis movie image, extracting regions of interest containing left and right ventricles, selecting a certain number of heart magnetic resonance short-axis movie images, and manually segmenting by experts to obtain a right ventricle contour so as to obtain a map image of the right ventricle; Affine propagation clustering is carried out on the atlas images of the right ventricle to obtain an atlas set; Calculating and comparing the map image with thetarget image to obtain a map set having the highest similarity measure with the target image, and then calculating and registering the map set with the target image to obtain a registration result; And fusing the registration results to obtain a segmentation result of the right ventricle.