A method with three-dimensional (3D) modeling of a wearer of a wearable device includes generating a feature map for each of a plurality of images of the wearer obtained from a plurality of imaging devices provided in the wearable device, obtaining joint keypoint information corresponding to joint positions of the wearer and initial shape coefficient information associated with a shape of the wearer based on the feature map for each of the images, determining a target 3D joint angle for 3D modeling of the wearer based on the joint keypoint information and the initial shape coefficient information, determining target shape coefficient information for 3D modeling of the wearer based on the joint keypoint information and the initial shape coefficient information, and obtaining a 3D mesh of the wearer based on the target 3D joint angle and the target shape coefficient information.