To provide a remote control device allowing a user, while remaining in a control office, quickly deal with inquiries from people other than workers, such as those living in the neighborhoods of a construction site, and passengers.

The remote control device performs remote control by causing signals including voices to be transmitted and received via a communication means between a plurality of construction sites and a control office controlling the plurality of construction sites. The construction site is equipped with a site communication means 32 for making communication with the control office, and distributed construction information 33. The site communication means 32 and the distributed information 33 are disposed on a construction signboard 34 provided at the construction site. The control office has an office communication means for making communication with the construction sites. Information including inquiries and opinions about the construction sites and the distributed information 33 can be collected and managed by the control office in the form of signals including voices.