An industrial vehicle remote operation system comprising: an industrial vehicle including a vehicle communication portion; and a communication device configured to be used for remote operation of the industrial vehicle, wherein the industrial vehicle includes a first signal conversion portion configured to convert a remote instruction signal of a predetermined data format into a control signal of a data format different from the data format of the remote instruction signal, the industrial vehicle is configured to operate based on the control signal converted by the first signal conversion portion, the communication device includes: a reception portion configured to receive an operation signal, which is output by an operation controller; an obtainment portion configured to obtain a conversion program for converting the operation signal into the remote instruction signal; a storage portion configured to store the conversion program; a second signal conversion portion configured to convert the operation signal into the remote instruction signal using the conversion program stored in the storage portion; and a communication device communication portion configured to send the remote instruction signal to the vehicle communication portion, the reception portion is configured to receive a plurality of types of operation signals that are output by a plurality of types of operation controllers and have different data formats, and the communication device includes an update portion configured to update information stored in the storage portion so as to enable addition, deletion, or change of one or more of the operation signals that are convertible by the second signal conversion portion. an industrial vehicle including a vehicle communication portion; and a communication device configured to be used for remote operation of the industrial vehicle, wherein the industrial vehicle includes a first signal conversion portion configured to convert a remote instruction signal of a predetermined data format into a control signal of a data format different from the data format of the remote instruction signal, the industrial vehicle is configured to operate based on the control signal converted by the first signal conversion portion, the communication device includes: a reception portion configured to receive an operation signal, which is output by an operation controller; an obtainment portion configured to obtain a conversion program for converting the operation signal into the remote instruction signal; a storage portion configured to store the conversion program; a second signal conversion portion configured to convert the operation signal into the remote instruction signal using the conversion program stored in the storage portion; and a communication device communication portion configured to send the remote instruction signal to the vehicle communication portion, a reception portion configured to receive an operation signal, which is output by an operation controller; an obtainment portion configured to obtain a conversion program for converting the operation signal into the remote instruction signal; a storage portion configured to store the conversion program; a second signal conversion portion configured to convert the operation signal into the remote instruction signal using the conversion program stored in the storage portion; and a communication device communication portion configured to send the remote instruction signal to the vehicle communication portion, the reception portion is configured to receive a plurality of types of operation signals that are output by a plurality of types of operation controllers and have different data formats, and the communication device includes an update portion configured to update information stored in the storage portion so as to enable addition, deletion, or change of one or more of the operation signals that are convertible by the second signal conversion portion.