Dual-comb spectroscopy (DCS) is one of the most attractive applications of optical frequency combs, because it realizes ultra-precise, broadband, and high-speed Fourier spectroscopy. The application of DCS has widely expanded to many fields, such as gas spectroscopy, distance measurement, material characterization. Among such techniques, the ultra-precise and highly controllable optical phase of combs have been utilized. However, the “phase” in this context is generally limited to the dimension of the longitudinal mode of light. Here, we focus on optical vortices with a spiral wavefront transporting orbital angular momentum (OAM). The spatial phase structure is applied to the dimensional conversion of optical combs into transverse modes. Recently, we proposed a fusion of these two concepts as an “optical vortex comb”. This idea enables arbitrary spatiotemporal phase control based on the high controllability of the optical combs. In this presentation, we will demonstrate our recent progress on novel DCS techniques utilizing the optical vortex comb concept, for example, in-plane angle measurement and spatiotemporal spectroscopic applications. Through the proposed optical vortex comb concept, the applicability of the optical combs is greatly expanded far beyond the conventional area.