As an important angle measurement device, the inclinometer is widely applied in aerospace attitude monitoring and other fields. High-resolution and high-sensitivity inclinometer is a prerequisite for accurate angle acquisition. However, existing inclinometers are often affected by friction-induced accuracy limitations, hindering their applications in precision measurement fields. This article proposes a diamagnetic levitation inclinometer based on electromagnetic induction, characterized by high resolution and non-contact measurement. By utilizing diamagnetic materials as a sensitive element and constructing a permanent magnet array with a potential energy well, stable levitation of the sensitive element is achieved. The measurement principle of the inclinometer is proposed based on the electromagnetic induction effect between the measurement unit and the sensitive element, the levitation position of the sensitive element changes with the input angle. An experimental platform is established to test the sensor′s performance. Experimental results show that the inclinometer can achieve dual-axis angle measurements within a range of ±1.3°, resolution of 0.005°, and linearity of 0.18%. It has significant potential for applications in the precision measurement of small tilt angles.