A hanging scale sensor apparatus (1) and a hanging scale (100) are provided. The hanging scale sensor apparatus (1) comprising a weighing sensor (10), an adapter beam (20), a support base (30) and a scale pan suspension structure (40).The adapter beam (20) is connected to one end of a bottom face of the weighing sensor (10). The support base (30) is connected to the other end of the bottom face of the weighing sensor (10). The adapter beam (20) and the support base (30) are positioned directly below the weighing sensor (10); and the scale pan suspension structure (40) is connected to the adapter beam (20) for positioning the hanging scale sensor apparatus (1).The hanging scale sensor apparatus (1) may be assembled separately, may be placed inside a scale body (50) according to requirements, and may further adjust the internal space of the scale body (50). The hanging scale sensor apparatus (1) has an adjustable installation position, and can realize two-way limitations, prevent overloading, and occupy small installation space. The hanging scale sensor apparatus (1) has a small overall size and thus has little influence on the structural layout of the scale body (50), and is suitable for the design of a super-thin scale body structure.