The development of organic fluorescent materials was of great interest for both fundamental research and practical applications. Piezofluorochromic or piezochromic fluorescent material was a "smart" material of which fluorescent properties were changed in response to external pressure stimuli. However, piezofluorochromic materials depended on the change of physical molecular packing modes were remaining extremely rare. In this work, a new discarbazolyl tetraphenylethylene compound was synthesized. The chemical structures of the derivative was determined by H-1 NMR, MS and elemental analyses, and its properties were investigated by PL, TGA, DSC and CV methods. The results show that the compound possess piezofluorochromic properties as well as aggregation-induced emission enhancement effect. The PL intensity and quantum yield in DMF/H2O with high water fraction were about 171, 100 times higher than those in pure DMF, respectively. The piezofluorochromic nature was generated through phase transformation from crystalline state (450 nm) to amorphous state(480 nm) under the external stimuli. The organic light emitting diode(OLED) device fabricated with the compound as non-doped emitters exhibited good performances with a maximum brightness of 2438 cd/m(2), a maximum current efficiency of 2.87 cd/A, and a maximum power efficiency of 1.81 lm/W. It is indicated that the compound is a multi-functional luminophor.