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Electronic and structural properties are studied at room temperature, whereas the magnetic performances of MoS2-nanoparticles (MoS2-NPs) are studied from room temperature (300 K) down to 5 K within the range of the magnetic field − 10 T to + 10 T. We find that MoS2-NPs display diamagnetic in the temperature range 300–50 K, whereas at ≈ 45 K the M–H hysteresis curve shows the presence of both diamagnetic and ferromagnetic behaviours. The existence of ferromagnetism is significantly enhanced from 40 K down to 5 K, presumably due to Mo-atom, S-vacancies/O-vacancies, defective structure due to the higher density of dangling bonds, and small MoS2-NPs sizes. Different ferromagnetic parameters viz. saturation magnetization, retentivity, and coercivity of MoS2-NP at ≈ 5 K are 55 m emu/g, 45 m emu/g, and 4500 Oe respectively are obtained from the M–H hysteresis curve. The electronic, microstructures and defects are also studied using XPS/UPS and Raman spectrum that correlated/consistence with the magnetic performances of MoS2-NPs. This low temperature (≤ 40 K) ferromagnetism in MoS2-NPs could be useful for low temperature promising potential technological magnetic applications. [ABSTRACT FROM AUTHOR]