These diverse applications highlight the transformative potential of vdW heterostructures in driving technological innovation and tackling modern scientific challenges. Concurrently, this immense potential has fueled substantial advancements in the transfer techniques for mechanically stacking 2D materials to construct vdW heterostructures over the past decade [6; 9; 80; 69; 81; 82; 83; 84; 85; 86; 87; 88; 89; 90; 6]. However, despite significant advancements in photodetectors and other applications, challenges remain in achieving consistent performance metrics, which can be attributed to variations in transfer processes, contamination issues and transfer complexity [76]. Addressing the complexities associated with the initial synthesis of high-quality 2D heterostructures with precise controllability and the reliable characterization of the formed vdW structures are also crucial. Moreover, the environmental stability of air-sensitive 2D materials, like BP, is another critical concern that must be addressed to unlock their full potential in real-world applications. While each of these challenges need to be addressed in its own right, for instance through improvements in synthesis and transfer methods, or through advances in characterization methods, several key challenges related to alignment precision between vdW layers, transfer complexity, cross contamination and air-sensitive material handling can be addressed through careful design consideration of transfer systems and through innovative modifications. Current transfer systems enable the precise handling and assembly of arbitrary 2D materials, irrespective of their lattice parameters. This level of precision is achieved through systems that typically incorporate optical microscopes, three-axis micro positioners, and rotational stages, ensuring sub-micrometer accuracy in lateral positioning and rotation precision within less than 1\({}^{\circ}\)[81, 82, 83]. While many setups are manually operated under standard atmospheric conditions, there is a growing trend towards installations in gloveboxes or vacuum chambers with motorized stages to improve environmental control, minimize contamination, and enhance the reproducibility of the transfer process [84, 85, 86, 87]. In addition, several innovative modifications to existing transfer systems [88, 89, 90, 91] have shown promise in offsetting issues related to contamination and scalability. It is, therefore, clear that addressing these challenges through improved transfer systems is essential for the reliable application of vdW heterostructures in various devices. Moreover, despite the significant advances in transfer techniques and literature reviews [6, 9, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31] on this topic, there has been a lack of focused reviews on the transfer systems themselves. This review aims to fill that gap by discussing the various transfer systems reported in the literature, evaluating their complexity, cost, and effectiveness, and addressing the current challenges that need to be overcome. By doing so, we also hope that this review will serve as a useful reference point for researchers wanting to design 2D materials' transfer systems. The review is structured as follows: Section 2 outlines the basic requirements for an effective 2D material transfer system, including key components, such as microscope optics, substrate holder design, and stamp holder design. Section 3 examines transfer setups integrated with glovebox systems, which are essential for handling air-sensitive materials. Section 4 highlights cost-effective transfer systems and recent advancements in the field. Section 5 addresses current challenges in van der Waals assembly, and the corresponding need for advanced systems, such as cleanroom in a glovebox, and robotic automation. Finally, Section 6 discusses remaining challenges and possible future directions for research.