An electric wire production system comprising: a production department for producing an electric wire, an outer surface of which is monochrome; and a coloring department for coloring an outer surface of an electric wire with a desired mark having a desired color (B, R); characterized by an input department to which electric wire production data indicating a product number and length of an electric wire to be produced, a shape of a mark to be formed on an outer surface of the electric wire, and a color of the mark are inputted; and a production control department to which the electric wire production data is inputted from the input department, wherein the production control department makes first production data indicating a product number and length of an electric wire to be produced on the basis of the electric wire production data inputted from the input department and forwards the first production data to the production department, and makes second production data indicating a product number of an electric wire to be produced, a shape of a mark to be formed on an outer surface of the electric wire, and a color of the mark on the basis of the electric wire production data and forwards the second production data to the coloring department, the production department produces a monochrome electric wire having a product number and length according to the first production data and conveys the monochrome electric wire to the coloring department, and the coloring department colors an outer surface of the monochrome electric wire with a desired color (B, R) according to the second production data and forms a desired mark on the outer surface, wherein the production department is configured such that, when the first production data is forwarded from the production control department, the production department forwards first confirmation data, which indicates a date when an amount of an electric wire according to the first production data becomes conveyable to the coloring department, to both production control department and coloring department. a production department for producing an electric wire, an outer surface of which is monochrome; and a coloring department for coloring an outer surface of an electric wire with a desired mark having a desired color (B, R); characterized by an input department to which electric wire production data indicating a product number and length of an electric wire to be produced, a shape of a mark to be formed on an outer surface of the electric wire, and a color of the mark are inputted; and a production control department to which the electric wire production data is inputted from the input department, wherein the production control department makes first production data indicating a product number and length of an electric wire to be produced on the basis of the electric wire production data inputted from the input department and forwards the first production data to the production department, and makes second production data indicating a product number of an electric wire to be produced, a shape of a mark to be formed on an outer surface of the electric wire, and a color of the mark on the basis of the electric wire production data and forwards the second production data to the coloring department, the production department produces a monochrome electric wire having a product number and length according to the first production data and conveys the monochrome electric wire to the coloring department, and the coloring department colors an outer surface of the monochrome electric wire with a desired color (B, R) according to the second production data and forms a desired mark on the outer surface, wherein the production department is configured such that, when the first production data is forwarded from the production control department, the production department forwards first confirmation data, which indicates a date when an amount of an electric wire according to the first production data becomes conveyable to the coloring department, to both production control department and coloring department.