A polyester is copolymerized with diacid monomer, esterified diacid monomer or a combination thereof with a polyol monomer. The diacid monomer, the esterified diacid monomer or the combination thereof includes (1) furan dicarboxylic acid, dialkyl furandicarboxylate, or a combination thereof or (2) furan dicarboxylic acid, dialkyl furandicarboxylate, or a combination thereof and spiro-diacid. The polyol monomer includes (3) C2-C14 polyol or (4) C2-C14 polyol and spiro-diol of Formula (I): and the spiro-diacid of Formula (II): The diacid monomer, esterified diacid monomer or combination thereof and polyol monomer meet: (a) The diacid monomer, the esterified diacid monomer or combination thereof includes (2) furan dicarboxylic acid, dialkyl furandicarboxylate, or the combination thereof and spiro-diacid or (b) The polyol monomer includes (4) C2-C14 polyol and spiro-diol, and an amount of spiro-diol or spriro-diacid is 500 ppm to 2000 ppm based on a weight of furan dicarboxylic acid, dialkyl furandicarboxylate, or combination thereof.