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With Solar Orbiter (SO) being put into successful operational observation, solar magnetic observation has entered the era of remote sensing from dual view points. In this paper, we carried out a simulation of correcting the 180 ∘ ambiguity of transverse magnetic field with magnetograms from dual view points using an analytical formula as well as the observations made by the Helioseismic and Magnetic Imager (HMI). Magnetograms of a small mature sunspot at different times were used to simulate magnetograms from dual view points. We find that in order to correct the 180 ∘ ambiguity of the vector magnetograms, it is sufficient to have a line-of-sight magnetogram from another view point to help to judge the direction of the transverse magnetic field. For the measuring accuracy of HMI, we estimate that a ∼ 30 ∘ angle formed from two observational points is the smallest angle to correct the 180 ∘ ambiguity around the place with the magnetic field strength of < 50 Gs. Correction for weaker magnetic fields surely needs larger separation angles, but considering projection effect, we propose that separation angles of ∼ 30 ∘ are the optimal angles for future space missions with the scientific aim of correcting the 180 ∘ ambiguity of vector magnetograms. [ABSTRACT FROM AUTHOR]