Insulated Panel Wall System has self-supporting metal panel system insulated with rock wool for wall and partition applications, which require a high degree of fire resistance and acoustic insulation. The System has temperature up to 1000 ° C. The System is fire resistant type in nature. The Insulated Panel Wall System consists of two micro ribbed steel sheets, with an insulation core of orientated fibre high density rockwool, arranged perpendicularly to the plane of the panel and positioned in strips, laid longitudinally with off-set joints and transversely compacted, in such a way as to completely fill the space between the metal facings.