The invention discloses an automatic calibrating method of make-to-order production materials by a server. The method comprises the following steps: each machine automatically generates an SN (Serial Number) number according to a production order BOM (Bill of Materiel) established in ERP (Enterprise Resource Planning), wherein the SN number is associated with the production order number and the production order BOM comprises PN (Part Number) codes of all materials, material description, standard quantity of the materials, make-to-order number and the production order number; quality guarantee bar codes are adhered to all materials, wherein each quality guarantee bar code comprises two pieces of association information: PN code and QN (Quality Notification) code; based on existing file code scanning program, an automatic calibrating script program is compiled; after wall parts are code-scanned, the save button is clicked, thus, a background calibrating program further checks the PN, quantity and BOM of all code-scanning parts; when the result is inconsistent, mistaken material rows are prompted; and if no mistakes are found, the product record is successfully stored. By adopting the technology provided by the invention, under a mode of customerized production of a server product, manual checking work can be completed by system and program.